Markdium-Simple Firebase Login Flow in Flutter, Now Firebase

Markdium-Dart.dart

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: FutureBuilder(
        future: Provider.of(context).getUser(),
        builder: (context, AsyncSnapshot snapshot) { //          ⇐ NEW
          if (snapshot.connectionState == ConnectionState.done) {
            // log error to console                                            ⇐ NEW
            if (snapshot.error != null) {
              print("error");
              return Text(snapshot.error.toString());
            }
            // redirect to the proper page, pass the user into the 
            // `HomePage` so we can display the user email in welcome msg     ⇐ NEW
            return snapshot.hasData ? HomePage(snapshot.data) : LoginPage();
          } else {
            // show loading indicator                                         ⇐ NEW
            return LoadingCircle();
          }
        },
      ),
    );
  }
}