I Have Migrated To Null-safety (2.15.1) And This Problem Still Persists

I get the error below when I compile the app.

The following NoSuchMethodError was thrown building MyApp(dirty, state: _MyAppState#73713):
The method 'call' was called on null.
Receiver: null
Tried calling: call(Instance of 'ChangeNotifierProvider<UserLoggedIn>')

The error points me to the 'MyApp' part of the code and so I have no idea how to tackle this one. My app ran with no error before migrating. This is a part of my code where the cause for this error is. I went through the code with and I can't find a possible syntax error.

    void main() {
  runApp(ProviderScope(child: MyApp()));
}

class MyApp extends StatefulHookWidget {
   @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {


  bool _amplifyConfigured = false;
  bool checkAuthStatus = false;

  late AmplifyAuthCognito auth;


  var userLoggedIn;
  var useProvider;

  @override

  void initState() {
    // TODO: implement initState
    super.initState();
    _configureAmplify();
  }

  void _configureAmplify() async {
    if (!mounted) return;


    auth = AmplifyAuthCognito();
    await Amplify.addPlugin(auth);

    try {
      await Amplify.configure(amplifyconfig);
    } on AmplifyAlreadyConfiguredException {
      print('Already configured');
    }

    try {
      getUserStatus();
      setState(() {
        _amplifyConfigured = true;
      });
    } catch (e) {
      print(e);
    }
  }



  @override
  Widget build(BuildContext context) {
    userLoggedIn = useProvider(userLoggedInProvider);

    ```

Riverpod removed useProvider in version 1.0.0. As described in the migration guide, you will need to use StatefulHookConsumerWidget instead of StatefulHookWidget to access that same functionality in the newest version:

class MyApp extends StatefulHookConsumerWidget {
   @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends ConsumerState<MyApp> {

  // ...

  @override
  Widget build(BuildContext context) {
    userLoggedIn = ref.watch(userLoggedInProvider);
    // ...