Allow common authentication by firebase auth for all platforms
Features
- Login by Google on Mobile, Desktop and Web.
Getting started
List prerequisites and provide or point to information on how to start using the package.
Usage
Include short and useful examples for package users. Add longer examples
to /example
folder.
Additional information
```dart
return MultiBlocProvider(
providers: [
BlocProvider<AuthBloc>(
create: (_) => AuthBloc(),
),
],
child: MaterialApp(..),
);
```