How to use the ngx-auth-firebaseui.NgxAuthFirebaseUIModule.forRoot function in ngx-auth-firebaseui

return new TranslateHttpLoader(http, './assets/i18n/', '.json');
}

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    // Add .withServerTransition() to support Universal rendering.
    // The application ID can be any identifier which is unique on
    // the page.
    BrowserModule.withServerTransition({appId: 'ngx-auth-firebaseui'}),
    Angulartics2Module.forRoot(),
    ServiceWorkerModule.register('/ngsw-worker.js', {enabled: environment.production}),
    AngularFireModule.initializeApp(firebaseKey),
    NgxAuthFirebaseUIModule.forRoot(firebaseKey, firebaseAppNameFactory,
      {
        enableFirestoreSync: true,
        toastMessageOnAuthSuccess: true,
        toastMessageOnAuthError: true,
        authGuardFallbackURL: 'examples/logged-out',
        authGuardLoggedInURL: 'examples/logged-in',
      }),
    TranslateModule.forRoot({
      loader: {
        provide: TranslateLoader,
        useFactory: (createTranslateLoader),
        deps: [HttpClient]
      }
    }),
    HighlightModule.forRoot({
      languages: hljsLanguages

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [
        NgxAuthFirebaseUIModule.forRoot(null)],
      declarations: [HomeComponent]
    })
      .compileComponents()
      .then(() => {
        fixture = TestBed.createComponent(HomeComponent);
        component = fixture.componentInstance;
      });
  }));

MatCardModule,
  MatIconModule,
  MatToolbarModule,
  MatTabsModule
} from '@angular/material';


@NgModule({
  declarations: [
    AppComponent,
    BadgesComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    NgxAuthFirebaseUIModule.forRoot(YourFirebaseAppConfig),
    FormsModule,
    FlexLayoutModule,
    MatToolbarModule,
    MatTabsModule,
    MatCardModule,
    MatButtonModule,
    MatIconModule,
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

BrowserModule,
    BrowserAnimationsModule,
    MatButtonModule, MatCheckboxModule, MatMenuModule, MatInputModule, MatSnackBarModule,
    MatToolbarModule, MatDialogModule, MatSidenavModule, MatNativeDateModule,
    MatCardModule, MatTabsModule, MatIconModule,
    FormsModule,
    ReactiveFormsModule,
    HttpClientModule,
    AppRoutingModule,
    PipesModule,
    BlocksModule,
    AuthModule,
    BackgroundsModule,
    ProfileModule,
    MiscModule,
    NgxAuthFirebaseUIModule.forRoot(firebaseKeys)
  ],
  providers: [
    UserService,
    AlertService,
    AuthGuardService,
    AuthService,
    WindowService
  ],
  schemas: [
    CUSTOM_ELEMENTS_SCHEMA
  ],
  bootstrap: [AppComponent]
})
export class AppModule {
}