Trying to read a streamProvider inside initState, but failed. Enlight me please, what am I doing wrong here?

```
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      final userStream = context.read(userStreamProvider);
      print('user : $userStream'); // user : AsyncValue<Null>.loading()
    });
  }

```

So far, what I found that `context.read(userStreamProvider)` only works inside
`build(BuildContext context)` method