anchor.diff:  
       ///INITIALIZE SERVICES
       _barcodeService = BarcodeService();
  -    _cameraState = Plugins.FrontCamera;
  -    _submitState = ButtonText.SubmitButtonActive;
  -    _qrText = "";
  +    initState();
     }
   
     ///STATES
  
positive.code:         notifyListeners();
        }
      });
    }
  
    Future<Map<String, dynamic>> createUserData() async {
  
negative.code:   ///SERVICES
    BarcodeService _barcodeService;
  
    void initState() {
      _cameraState = Plugins.FrontCamera;
      _submitState = ButtonText.SubmitButtonActive;
      _qrText = "";
    }
  
    void onQRViewCreated(QRViewController controller) {
      initState();
      this._controller = controller;
      controller.scannedDataStream.listen((scanData) {
        if (_qrText != scanData) {
  