You need to use the context to call Provider.of() so you can add addPostFrameCallback() which is called after the first build, there you can use the context @override void initState() { super.initState(); WidgetsBinding.instance.addPostFrameCallback((timeStamp) { auth = Provider.of<Auth>(context, listen: false); }); }
Don’t stock context directly into custom classes, and don’t use context after async if you’re not sure your widget is mounted. Do something like this: class MyCustomClass { const MyCustomClass(); Future<void> myAsyncMethod(BuildContext context, VoidCallback onSuccess) async { await Future.delayed(const Duration(seconds: 2)); onSuccess.call(); } } class MyWidget extends StatefulWidget { @override _MyWidgetState createState() => _MyWidgetState(); } … Read more