requestCode method Null safety

Future<String?> requestCode()

Implementation

Future<String?> requestCode() async {
  _code = null;
  final urlParams = _constructUrlParams();
  var webView = WebView(
    initialUrl: '${_authorizationRequest.url}?$urlParams',
    javascriptMode: JavascriptMode.unrestricted,
    navigationDelegate: _navigationDelegate,
  );
  await _config.navigatorKey.currentState!.push(MaterialPageRoute(
      builder: (context) => Scaffold(
            body: SafeArea(child: webView),
          )));
  return _code;
}