title: How to update nested screens based on riverpods streamProvider?
body: <p>Imagine there are three screens. main.dart, home.dart &amp; signIn.dart
  I have the code, shown below. When I'm in the homescreen and the streamProvider(firebaseAuthStateProvider) changes, I will get automatically back to the main.dart screen. After that, the if-query sends me right to the signIn.dart screen. Just like expected. But when I create a new nested screen and the streamProvider changes its value, the &quot;root&quot; screen (home.dart) doesn't send me back to the signIn screen. So I imagine it only works for the first child and not the nested ones.</p>
  <p>Is it possible to have just one query to check for a streamProvider in the root screen or do i have to put a query in every single screen to check the value?</p>
  <pre><code>class SignInCheck extends ConsumerWidget {
    @override
    Widget build(BuildContext context, ScopedReader scopedReader) {
      final _authState = scopedReader(firebaseAuthStateProvider); //
      return _authState.when(data: (value) {
        if (value != null) {
          return HomeScreen();
        } else {
          return SignIn();
        }
        //...
  </code></pre>