diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..07cdcd0f50952a0cbd3c95757019b4965e4360ac
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+target/classes/org/s4s/SimpleLoginMainView$1.class
+target/classes/org/s4s/SimpleLoginMainView.class
+target/classes/org/s4s/SimpleLoginUI$1.class
+target/classes/org/s4s/SimpleLoginUI.class
+target/classes/org/s4s/SimpleLoginView$PasswordValidator.class
+target/classes/org/s4s/SimpleLoginView.class
diff --git a/.idea/misc.xml b/.idea/misc.xml
index db55eebe81bc86a211c4fab2b39a66c3d4979beb..226808277dddae5720af578d452af0f09756807c 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -38,6 +38,9 @@
       <property name="caretWidth" class="java.lang.Integer" />
     </properties>
   </component>
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="gwt" url="file://$PROJECT_DIR$" />
     <file type="web" url="file://$PROJECT_DIR$" />
@@ -49,7 +52,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/classes" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 6d2e1df5f89edd1585a9a82d8bb9f7bfae67d29e..2702c7434c6af583653b4ebb52a356c06c52e266 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,18 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="5f36371d-de5c-44ce-a12c-613727d95355" name="Default" comment="">
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/artifacts/shopInShop_war.xml" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/artifacts/shopInShop_war_exploded.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/target/classes/org/s4s/MyUI$MyUIServlet.class" afterPath="$PROJECT_DIR$/target/classes/org/s4s/MyUI$MyUIServlet.class" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/target/classes/org/s4s/MyUI.class" afterPath="$PROJECT_DIR$/target/classes/org/s4s/MyUI.class" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/misc.xml" afterPath="$PROJECT_DIR$/.idea/misc.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/shopInShop.iml" afterPath="$PROJECT_DIR$/shopInShop.iml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java" afterPath="$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/main/webapp/VAADIN/themes/mytheme/styles.css" afterPath="$PROJECT_DIR$/src/main/webapp/VAADIN/themes/mytheme/styles.css" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst" afterPath="$PROJECT_DIR$/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst" />
-    </list>
+    <list default="true" id="5f36371d-de5c-44ce-a12c-613727d95355" name="Default" comment="" />
     <ignored path="shopInShop.iws" />
     <ignored path=".idea/workspace.xml" />
     <ignored path="$PROJECT_DIR$/target/" />
@@ -24,6 +13,7 @@
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
+  <component name="ChangesViewManager" flattened_view="true" show_ignored="false" />
   <component name="CreatePatchCommitExecutor">
     <option name="PATCH_PATH" value="" />
   </component>
@@ -33,27 +23,12 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="375">
-      <file leaf-file-name="README.md" pinned="false" current-in-tab="false">
+      <file leaf-file-name="README.md" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/README.md">
-          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-            <state split_layout="SPLIT">
-              <first_editor relative-caret-position="0">
-                <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-                <folding />
-              </first_editor>
-              <second_editor />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="MyUI.java" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="243">
-              <caret line="28" column="5" lean-forward="true" selection-start-line="28" selection-start-column="5" selection-end-line="28" selection-end-column="5" />
-              <folding>
-                <element signature="imports" expanded="true" />
-              </folding>
+            <state relative-caret-position="0">
+              <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+              <folding />
             </state>
           </provider>
         </entry>
@@ -61,8 +36,8 @@
       <file leaf-file-name="pom.xml" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/pom.xml">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="3652">
-              <caret line="166" column="32" lean-forward="false" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
+            <state relative-caret-position="424">
+              <caret line="166" column="32" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
               <folding />
             </state>
           </provider>
@@ -70,6 +45,13 @@
       </file>
     </leaf>
   </component>
+  <component name="FileTemplateManagerImpl">
+    <option name="RECENT_TEMPLATES">
+      <list>
+        <option value="Class" />
+      </list>
+    </option>
+  </component>
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
@@ -81,6 +63,10 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
+        <option value="$PROJECT_DIR$/src/main/java/org/s4s/StartView.java" />
+        <option value="$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginMainView.java" />
+        <option value="$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginUI.java" />
+        <option value="$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginView.java" />
         <option value="$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java" />
       </list>
     </option>
@@ -91,6 +77,13 @@
     <detection-done>true</detection-done>
     <sorting>DEFINITION_ORDER</sorting>
   </component>
+  <component name="MavenImportPreferences">
+    <option name="generalSettings">
+      <MavenGeneralSettings>
+        <option name="mavenHome" value="Bundled (Maven 3)" />
+      </MavenGeneralSettings>
+    </option>
+  </component>
   <component name="MavenProjectNavigator">
     <treeState>
       <PATH>
@@ -98,68 +91,24 @@
           <option name="myItemId" value="" />
           <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$RootNode" />
         </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="shopInShop" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$ProjectNode" />
-        </PATH_ELEMENT>
-      </PATH>
-      <PATH>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$RootNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="shopInShop" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$ProjectNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="Plugins" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$PluginsNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="jetty" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$PluginNode" />
-        </PATH_ELEMENT>
-      </PATH>
-      <PATH>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$RootNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="shopInShop" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$ProjectNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="Plugins" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$PluginsNode" />
-        </PATH_ELEMENT>
-      </PATH>
-      <PATH>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$RootNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="shopInShop" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$ProjectNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="Plugins" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$PluginsNode" />
-        </PATH_ELEMENT>
-        <PATH_ELEMENT>
-          <option name="myItemId" value="vaadin" />
-          <option name="myItemType" value="org.jetbrains.idea.maven.navigator.MavenProjectsStructure$PluginNode" />
-        </PATH_ELEMENT>
       </PATH>
     </treeState>
   </component>
   <component name="ProjectFrameBounds">
     <option name="x" value="-8" />
-    <option name="y" value="-8" />
-    <option name="width" value="1936" />
-    <option name="height" value="1056" />
+    <option name="y" value="22" />
+    <option name="width" value="1616" />
+    <option name="height" value="886" />
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="false">
+    <OptionsSetting value="true" id="Add" />
+    <OptionsSetting value="true" id="Remove" />
+    <OptionsSetting value="true" id="Checkout" />
+    <OptionsSetting value="true" id="Update" />
+    <OptionsSetting value="true" id="Status" />
+    <OptionsSetting value="true" id="Edit" />
+    <ConfirmationsSetting value="0" id="Add" />
+    <ConfirmationsSetting value="0" id="Remove" />
   </component>
   <component name="ProjectView">
     <navigator currentView="ProjectPane" proportions="" version="1">
@@ -176,8 +125,8 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="Scope" />
       <pane id="PackagesPane" />
-      <pane id="Scratches" />
       <pane id="ProjectPane">
         <subPane>
           <PATH>
@@ -185,10 +134,6 @@
               <option name="myItemId" value="shopInShop" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ExternalLibrariesNode" />
-            </PATH_ELEMENT>
           </PATH>
           <PATH>
             <PATH_ELEMENT>
@@ -196,7 +141,7 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="s4s" />
+              <option name="myItemId" value="GitLab" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
           </PATH>
@@ -206,7 +151,7 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="s4s" />
+              <option name="myItemId" value="GitLab" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
@@ -217,14 +162,6 @@
               <option name="myItemId" value="main" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="webapp" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="VAADIN" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
           </PATH>
           <PATH>
             <PATH_ELEMENT>
@@ -232,7 +169,7 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="s4s" />
+              <option name="myItemId" value="GitLab" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
@@ -254,7 +191,7 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="s4s" />
+              <option name="myItemId" value="GitLab" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
@@ -276,7 +213,7 @@
           </PATH>
         </subPane>
       </pane>
-      <pane id="Scope" />
+      <pane id="Scratches" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -331,7 +268,7 @@
       <predefined_log_file id="idea.log" enabled="true" />
       <method />
     </configuration>
-    <configuration default="true" type="AndroidRunConfigurationType" factoryName="Android App">
+    <configuration default="true" type="AndroidRunConfigurationType" factoryName="Android Application">
       <module name="" />
       <option name="DEPLOY" value="true" />
       <option name="ARTIFACT_NAME" value="" />
@@ -341,20 +278,11 @@
       <option name="TARGET_SELECTION_MODE" value="SHOW_DIALOG" />
       <option name="PREFERRED_AVD" value="" />
       <option name="CLEAR_LOGCAT" value="false" />
-      <option name="SHOW_LOGCAT_AUTOMATICALLY" value="false" />
+      <option name="SHOW_LOGCAT_AUTOMATICALLY" value="true" />
       <option name="SKIP_NOOP_APK_INSTALLATIONS" value="true" />
       <option name="FORCE_STOP_RUNNING_APP" value="true" />
-      <option name="DEBUGGER_TYPE" value="Java" />
       <option name="USE_LAST_SELECTED_DEVICE" value="false" />
       <option name="PREFERRED_AVD" value="" />
-      <Java />
-      <Profilers>
-        <option name="ENABLE_ADVANCED_PROFILING" value="true" />
-        <option name="GAPID_ENABLED" value="false" />
-        <option name="GAPID_DISABLE_PCS" value="false" />
-        <option name="SUPPORT_LIB_ENABLED" value="true" />
-        <option name="INSTRUMENTATION_ENABLED" value="true" />
-      </Profilers>
       <option name="DEEP_LINK" value="" />
       <option name="ACTIVITY_CLASS" value="" />
       <method />
@@ -373,17 +301,8 @@
       <option name="SHOW_LOGCAT_AUTOMATICALLY" value="true" />
       <option name="SKIP_NOOP_APK_INSTALLATIONS" value="true" />
       <option name="FORCE_STOP_RUNNING_APP" value="true" />
-      <option name="DEBUGGER_TYPE" value="Java" />
       <option name="USE_LAST_SELECTED_DEVICE" value="false" />
       <option name="PREFERRED_AVD" value="" />
-      <Java />
-      <Profilers>
-        <option name="ENABLE_ADVANCED_PROFILING" value="true" />
-        <option name="GAPID_ENABLED" value="false" />
-        <option name="GAPID_DISABLE_PCS" value="false" />
-        <option name="SUPPORT_LIB_ENABLED" value="true" />
-        <option name="INSTRUMENTATION_ENABLED" value="true" />
-      </Profilers>
       <method />
     </configuration>
     <configuration default="true" type="Applet" factoryName="Applet">
@@ -409,7 +328,7 @@
       <envs />
       <method />
     </configuration>
-    <configuration default="true" type="ArquillianJUnit" factoryName="" nameIsGenerated="true">
+    <configuration default="true" type="ArquillianJUnit" factoryName="">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <module name="" />
       <option name="arquillianRunConfiguration">
@@ -560,7 +479,6 @@
       <setting name="cmdLine" value="run-app" />
       <setting name="passParentEnv" value="true" />
       <setting name="launchBrowser" value="true" />
-      <setting name="launchBrowserUrl" value="" />
       <setting name="depsClasspath" value="false" />
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <method />
@@ -586,6 +504,27 @@
       <patterns />
       <method />
     </configuration>
+    <configuration default="true" type="JUnitTestDiscovery" factoryName="JUnit Test Discovery" changeList="All">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <module name="" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="PACKAGE_NAME" />
+      <option name="MAIN_CLASS_NAME" />
+      <option name="METHOD_NAME" />
+      <option name="TEST_OBJECT" value="class" />
+      <option name="VM_PARAMETERS" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="singleModule" />
+      </option>
+      <envs />
+      <patterns />
+      <method />
+    </configuration>
     <configuration default="true" type="JarApplication" factoryName="JAR Application">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <envs />
@@ -607,19 +546,6 @@
       <envs />
       <method />
     </configuration>
-    <configuration default="true" type="JavaScriptTestRunnerJest" factoryName="Jest">
-      <node-interpreter value="project" />
-      <working-dir value="" />
-      <envs />
-      <scope-kind value="ALL" />
-      <method />
-    </configuration>
-    <configuration default="true" type="JavaScriptTestRunnerProtractor" factoryName="Protractor">
-      <config-file value="" />
-      <node-interpreter value="project" />
-      <envs />
-      <method />
-    </configuration>
     <configuration default="true" type="JavascriptDebugType" factoryName="JavaScript Debug">
       <method />
     </configuration>
@@ -712,6 +638,34 @@
       <listeners />
       <method />
     </configuration>
+    <configuration default="true" type="TestNGTestDiscovery" factoryName="TestNG Test Discovery" changeList="All">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <module name="" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="SUITE_NAME" />
+      <option name="PACKAGE_NAME" />
+      <option name="MAIN_CLASS_NAME" />
+      <option name="METHOD_NAME" />
+      <option name="GROUP_NAME" />
+      <option name="TEST_OBJECT" value="CLASS" />
+      <option name="VM_PARAMETERS" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" />
+      <option name="OUTPUT_DIRECTORY" />
+      <option name="ANNOTATION_TYPE" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="singleModule" />
+      </option>
+      <option name="USE_DEFAULT_REPORTERS" value="false" />
+      <option name="PROPERTIES_FILE" />
+      <envs />
+      <properties />
+      <listeners />
+      <method />
+    </configuration>
     <configuration default="true" type="js.build_tools.gulp" factoryName="Gulp.js">
       <node-interpreter>project</node-interpreter>
       <node-options />
@@ -722,7 +676,7 @@
       <method />
     </configuration>
     <configuration default="true" type="js.build_tools.npm" factoryName="npm">
-      <command value="run" />
+      <command value="run-script" />
       <scripts />
       <node-interpreter value="project" />
       <envs />
@@ -742,7 +696,7 @@
         <item index="0" class="java.lang.String" itemvalue="Maven.shopInShop [jetty:run]" />
       </list>
     </recent_temporary>
-    <configuration default="true" type="AndroidRunConfigurationType" factoryName="Android Application">
+    <configuration default="true" type="AndroidRunConfigurationType" factoryName="Android App">
       <module name="" />
       <option name="DEPLOY" value="true" />
       <option name="ARTIFACT_NAME" value="" />
@@ -752,7 +706,7 @@
       <option name="TARGET_SELECTION_MODE" value="SHOW_DIALOG" />
       <option name="PREFERRED_AVD" value="" />
       <option name="CLEAR_LOGCAT" value="false" />
-      <option name="SHOW_LOGCAT_AUTOMATICALLY" value="true" />
+      <option name="SHOW_LOGCAT_AUTOMATICALLY" value="false" />
       <option name="SKIP_NOOP_APK_INSTALLATIONS" value="true" />
       <option name="FORCE_STOP_RUNNING_APP" value="true" />
       <option name="DEBUGGER_TYPE" value="Java" />
@@ -760,7 +714,11 @@
       <option name="PREFERRED_AVD" value="" />
       <Java />
       <Profilers>
+        <option name="ENABLE_ADVANCED_PROFILING" value="true" />
+        <option name="GAPID_ENABLED" value="false" />
         <option name="GAPID_DISABLE_PCS" value="false" />
+        <option name="SUPPORT_LIB_ENABLED" value="true" />
+        <option name="INSTRUMENTATION_ENABLED" value="true" />
       </Profilers>
       <option name="DEEP_LINK" value="" />
       <option name="ACTIVITY_CLASS" value="" />
@@ -779,48 +737,49 @@
       <updated>1492093190319</updated>
       <workItem from="1492093193584" duration="1280000" />
       <workItem from="1492103546172" duration="630000" />
+      <workItem from="1492519036812" duration="3509000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="1910000" />
+    <option name="totallyTimeSpent" value="5419000" />
   </component>
   <component name="ToolWindowManager">
-    <frame x="-8" y="-8" width="1936" height="1056" extended-state="6" />
+    <frame x="-8" y="22" width="1616" height="886" extended-state="6" />
     <editor active="true" />
     <layout>
       <window_info id="Palette" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
-      <window_info id="Nl-Palette" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
       <window_info id="Palette&#9;" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Image Layers" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
-      <window_info id="Java Enterprise" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Java Enterprise" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Capture Analysis" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="true" content_ui="tabs" />
-      <window_info id="Maven Projects" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.23541667" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
+      <window_info id="Maven Projects" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.025625" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
-      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.34054053" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Properties" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.34020618" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Capture Tool" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Designer" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
-      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2578125" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
-      <window_info id="Web" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="true" content_ui="tabs" />
+      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
+      <window_info id="Web" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
       <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
+      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3298969" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Ant Build" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="UI Designer" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Theme Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
       <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
       <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39986283" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="PlantUML" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
+      <window_info id="Nl-Palette" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
+      <window_info id="Properties" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
       <window_info id="Hierarchy" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="2" side_tool="false" content_ui="combo" />
       <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
+      <window_info id="Image Layers" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Inspection" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
-      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+      <window_info id="Theme Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
     </layout>
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -872,20 +831,36 @@
   </component>
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/README.md">
-      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-        <state split_layout="SPLIT">
-          <first_editor relative-caret-position="0">
-            <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-            <folding />
-          </first_editor>
-          <second_editor />
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+          <folding />
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/pom.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="2822">
+          <caret line="166" column="32" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/README.md" />
     <entry file="file://$PROJECT_DIR$/pom.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="3652">
-          <caret line="166" column="32" lean-forward="false" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
+          <caret line="166" column="32" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
           <folding />
         </state>
       </provider>
@@ -893,54 +868,77 @@
     <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="374">
-          <caret line="27" column="24" lean-forward="false" selection-start-line="27" selection-start-column="24" selection-end-line="27" selection-end-column="24" />
+          <caret line="27" column="24" selection-start-line="27" selection-start-column="24" selection-end-line="27" selection-end-column="24" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/README.md">
-      <provider editor-type-id="text-editor">
-        <state relative-caret-position="528">
-          <caret line="17" column="0" lean-forward="false" selection-start-line="17" selection-start-column="0" selection-end-line="17" selection-end-column="0" />
+    <entry file="file://$PROJECT_DIR$/src/main/resources/README">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/pom.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="424">
+          <caret line="166" column="32" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
           <folding />
         </state>
       </provider>
-      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-        <state split_layout="SPLIT">
-          <first_editor relative-caret-position="0">
-            <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-            <folding />
-          </first_editor>
-          <second_editor />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/StartView.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="204">
+          <caret line="20" column="29" selection-start-line="20" selection-start-column="29" selection-end-line="20" selection-end-column="29" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/resources/README">
+    <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginView.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+        <state relative-caret-position="1181">
+          <caret line="97" column="40" selection-start-line="97" selection-start-column="40" selection-end-line="97" selection-end-column="40" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/pom.xml">
+    <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginMainView.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="3652">
-          <caret line="166" column="32" lean-forward="false" selection-start-line="166" selection-start-column="32" selection-end-line="166" selection-end-column="32" />
+        <state relative-caret-position="642">
+          <caret line="40" column="0" selection-start-line="40" selection-start-column="0" selection-end-line="40" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/SimpleLoginUI.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="629">
+          <caret line="37" column="60" selection-start-line="37" selection-start-column="60" selection-end-line="37" selection-end-column="60" />
           <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/MyUI.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="243">
-          <caret line="28" column="5" lean-forward="true" selection-start-line="28" selection-start-column="5" selection-end-line="28" selection-end-column="5" />
+        <state relative-caret-position="323">
+          <caret line="19" column="3" selection-start-line="19" selection-start-column="3" selection-end-line="19" selection-end-column="3" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/README.md">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
   </component>
 </project>
\ No newline at end of file
diff --git a/shopInShop.iml b/shopInShop.iml
index c2314df28f2f690fd9796ad6c50d08bbece07dba..98c72b29bb39bcd4c9a7d3e91ca12ba7df12d954 100644
--- a/shopInShop.iml
+++ b/shopInShop.iml
@@ -14,14 +14,17 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
     <output url="file://$MODULE_DIR$/target/classes" />
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/target/generated-resources/gwt" type="java-resource" />
-      <excludeFolder url="file://$MODULE_DIR$/target" />
+      <excludeFolder url="file://$MODULE_DIR$/target/.generated" />
+      <excludeFolder url="file://$MODULE_DIR$/target/classes" />
+      <excludeFolder url="file://$MODULE_DIR$/target/maven-status" />
+      <excludeFolder url="file://$MODULE_DIR$/target/tmp" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/src/main/java/org/s4s/MyUI.java b/src/main/java/org/s4s/MyUI.java
index 4e0d1b8bfb7a47b8f0e1c17b59a3e6aec8bd7b8f..d5af6b11c339d6cbb88dafdf1cb1ac491deb9003 100644
--- a/src/main/java/org/s4s/MyUI.java
+++ b/src/main/java/org/s4s/MyUI.java
@@ -1,16 +1,15 @@
+
 package org.s4s;
 
 import javax.servlet.annotation.WebServlet;
 
 import com.vaadin.annotations.Theme;
 import com.vaadin.annotations.VaadinServletConfiguration;
+import com.vaadin.navigator.Navigator;
 import com.vaadin.server.VaadinRequest;
 import com.vaadin.server.VaadinServlet;
-import com.vaadin.ui.Button;
-import com.vaadin.ui.Label;
-import com.vaadin.ui.TextField;
-import com.vaadin.ui.UI;
-import com.vaadin.ui.VerticalLayout;
+import com.vaadin.ui.*;
+
 
 /**
  * This UI is the application entry point. A UI may either represent a browser window 
@@ -19,17 +18,25 @@ import com.vaadin.ui.VerticalLayout;
  * The UI is initialized using {@link #init(VaadinRequest)}. This method is intended to be 
  * overridden to add component to the user interface and initialize non-component functionality.
  */
+
 @Theme("mytheme")
 public class MyUI extends UI {
+    Navigator navigator;
+    protected static final String MAINVIEW = "main";
+
 
     @Override
     protected void init(VaadinRequest vaadinRequest) {
+
         Label label = new Label("Das erste Label unseres Shop in Shop System");
         setContent(label);
+
     }
 
-    @WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
+    @WebServlet(urlPatterns = "*/
+/*", name = "MyUIServlet", asyncSupported = true)
     @VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
     public static class MyUIServlet extends VaadinServlet {
     }
 }
+
diff --git a/target/classes/org/s4s/MyUI$MyUIServlet.class b/target/classes/org/s4s/MyUI$MyUIServlet.class
index 879dafa7f882fae142a66cbb2a9045a884d47bb3..2ee6f97f5dd8ede813ee17667fe276ea918ffcaf 100644
Binary files a/target/classes/org/s4s/MyUI$MyUIServlet.class and b/target/classes/org/s4s/MyUI$MyUIServlet.class differ
diff --git a/target/classes/org/s4s/MyUI.class b/target/classes/org/s4s/MyUI.class
index 524348d03bc2bd253180a593c41e91852620612d..456672fa4d1cd47cd4e99564a5e4e28bc90c375c 100644
Binary files a/target/classes/org/s4s/MyUI.class and b/target/classes/org/s4s/MyUI.class differ