Where to initialize Firebase app

[thienvu18]

In lastest version of firebase, it's required to call await Firebase.initializeApp(); before using any function of Firebase. So where should we put this line of code?

[djordje-maslic]

Future main()async {
WidgetsFlutterBinding.ensureInitialized();
configureInjection(Environment.prod);
await Firebase.initializeApp();
runApp(AppWidget());
}