Is firebase correctly linked to my angular project?

<pre>const firebaseConfig = {
  apiKey: "",
  authDomain: "",
  databaseURL: "",
  projectId: "",
  storageBucket: "",
  messagingSenderId: "",
  appId: "",
  measurementId: ""
};




export const appConfig: ApplicationConfig = {
  providers: [
    provideRouter(routeConfig, withComponentInputBinding()),
    provideFirebaseApp(() => initializeApp(firebaseConfig)),
    provideAuth(() => getAuth()),
    provideFirestore(() => getFirestore()),
  ],
};

<pre>@Injectable()
export class DataSharingService {
    public isUserLoggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
}