[Flutter] FlutterError (Binding has not yet been initialized.The "instance" getter on the ServicesBinding binding mixin is only available once that binding has been initialized. 해결방법

2023-11-14 1. 원인 firebase와 flutter 앱을 연동하는 과정에서 아래와 같은 오류가 발생했다. FlutterError (Binding has not yet been initialized. The "instance" getter on the ServicesBinding binding mixin is only available once that binding has been initialized. Typically, this is done by calling "WidgetsFlutterBinding.ensureInitialized()" or "runApp()" (the latter calls the former). Typically this call is done in the "void..