anchor.diff:      }
     }
   
  +  /**
  +   * Deletes a user and returns true if succesful.
  +   * Needs the username and his password to authenticate.
  +   */
     Future<bool> deleteUser(String name, String pwd) async {
       if (!_available) return new Future.value(false);
       try {
  
positive.code:     }
    }
  
    Future<bool> changeUserPassword(String name, String oldPW,
        String newPW) async {
      if (!_available) return new Future.value(false);
  
negative.code:     }
    }
  
  
    Future<Map> loginUser(String name, String pwd) async {
      Map map = new Map();
      if (!_available) return new Future.value(false);
  