anchor.diff:                barrierDismissible: false);
             get(CodeWarsAPI.getUser(_user.username))
               ..then((val) {
  -              setState(() => _performChangeUser(val.body));
  +              _performChangeUser(val.body);
                 SharedPreferences.getInstance().then((sp) {
                   sp.setString(DatabaseKeys.USER, val.body);
                 });
  
positive.code:                 sp.setString(DatabaseKeys.USER, CodeWarsAPI
                      .getErrorWithReason("time out"));
                });
                setState(() {
                  _user = null;
                  _pop();
                });
              });
          }
        },
  
negative.code: 
    _changeTheBossOfThisGym() {
      SharedPreferences.getInstance().then((sp) {
        _performChangeUser(sp.getString(DatabaseKeys.USER) ??
            CodeWarsAPI.getErrorWithReason("not set"));
        _performChangeFriends(sp.getStringSet(DatabaseKeys.FRIENDS) ?? const[]);
      });
    }
  
  