Added user logout via the options menu.

Author: ashryanbeats

user-auth-ui/app/src/main/java/com/adobe/userauthui/MainActivity.java

@@ -125,7 +125,7 @@ public boolean onOptionsItemSelected(MenuItem item) {
         int id = item.getItemId();
 
         //noinspection SimplifiableIfStatement
-        if (id == R.id.action_settings) {
+        if (id == R.id.action_logout) {
             return true;
         }
 

user-auth-ui/app/src/main/res/menu/menu_main.xml

@@ -3,8 +3,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="com.adobe.userauthui.MainActivity">
     <item
-        android:id="@+id/action_settings"
+        android:id="@+id/action_logout"
         android:orderInCategory="100"
-        android:title="@string/action_settings"
+        android:title="@string/action_logout"
         app:showAsAction="never" />
 </menu>

user-auth-ui/app/src/main/res/values/strings.xml

@@ -1,4 +1,4 @@
 <resources>
     <string name="app_name">User Auth UI</string>
-    <string name="action_settings">Settings</string>
+    <string name="action_logout">Log Out</string>
 </resources>