Developing app in flutter and did firebase configuration to my flutter app.Using IDE - VSCode, Firebase configuration for flutter project. getting error all time zsh: command not found: flutterfire, giving error Undefined name 'DefaultFirebaseOptions'.

Try correcting the name to one that is defined, or defining the name.dartundefined_identifier

 this is my code -
        
        import 'firebase_options.dart';
        
        
        Future<void> main() async {`enter code here`
          WidgetsFlutterBinding.ensureInitialized();
          await Firebase.initializeApp(
            options: DefaultFirebaseOptions.currentPlatform,
          );
          
          runApp(const MyApp());
        }
        
        ==== getting error all time
        
    logcat ==

    getting error -  zsh: command not found: flutterfire
    
         flutterfire configure
        zsh: command not found: flutterfire