No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp() in Flutter and Firebase

Question

I am building a flutter App and I have integrated Firebase but I keep getting this error when I click on a button either to register, login or logout. I have seen other peop

Answer 1

If you followed Peter's answer and are still getting the same error, check to make sure anything else you have in your main function comes after the await Firebase.initializeApp() call, like so:

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  FirebaseCrashlytics.instance.setCrashlyticsCollectionEnabled(true);
  FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterError;
  runApp(MyApp());
}