Added central user credentials management

lib/view/pages/more/message/message.dart

@@ -1,10 +1,9 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:marianum_mobile/widget/loadingSpinner.dart';
 import 'package:provider/provider.dart';
 
 import '../../../../api/mhsl/message/getMessages/getMessagesResponse.dart';
 import '../../../../model/message/messageProps.dart';
+import '../../../../widget/loadingSpinner.dart';
 import 'messageView.dart';