login and begin listView

lib/models/user_model.dart

@@ -33,9 +33,9 @@ class UserModel {
 
   factory UserModel.fromMap(Map<String, dynamic> map) {
     return UserModel(
-      uuid: map['pk_userUuid'] as String,
-      username: map['benutzer'] as String,
-      passwort: map['kennwort'] as String,
+      uuid: (map['pk_userUuid'] as String).trim(),
+      username: (map['benutzer'] as String).trim(),
+      passwort: (map['kennwort'] as String).trim(),
     );
   }