fixed bug with logout menu item

lib/base/base_state.dart

@@ -58,20 +58,32 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   }
 
   List<Widget> getMenuButtons() {
+
+    List<Widget> menuItemList = [];
+    menuItemList.add(new PopupMenuItem(
+        value: 0,
+        child: getMenuItem(settings_png, StringsLocalization.settings())
+    ));
+
+    menuItemList.add(new PopupMenuItem(
+      value: 1,
+      child: getMenuItem(settings_png, StringsLocalization.help())
+    ));
+
+    helper.getToken().then((token){
+      if (token != null) { // пользователь авторизован
+        menuItemList.add(new PopupMenuItem(
+          value: 2,
+          child: getMenuItem(settings_png, StringsLocalization.logout())
+        ));
+      }
+    });
+
     return <Widget>[
       new PopupMenuButton<int>(
           onSelected: onOptionsItemClick,
           itemBuilder: (BuildContext context) {
-            return [new PopupMenuItem(
-                value: 0,
-                child: getMenuItem(settings_png, StringsLocalization.settings())),
-            new PopupMenuItem(
-                value: 1,
-                child: getMenuItem(help_png, StringsLocalization.help())),
-            new PopupMenuItem(
-                value: 2,
-                child: getMenuItem(logout_png, StringsLocalization.logout()))
-            ];
+            return menuItemList;
           }
       )
     ];

lib/common.dart

@@ -216,6 +216,6 @@ getLocaleTitle(String code) {
 }
 
 // Добавил вызов, что-бы AOT компилер не выкинул либу.
-getImage() {
+getImage() async {
     return await ImagePicker.pickImage();
 }