"../../node_modules/@angular/fire/firestore/angular-fire-firestore"' has no exported member 'FirestoreSettingsToken'.ts(2305) code example

Example 1: how to import firestoresettingstoken

import { FirestoreSettingsToken } from '@angular/fire/firestore';

...

{ provide: FirestoreSettingsToken, useValue: {} }

Example 2: how to import firestoresettingstoken

import { AngularFirestoreModule, FirestoreSettingsToken } from '@angular/fire/firestore';
@NgModule({
  declarations: [AppComponent],
  imports: [
     ...
     AngularFirestoreModule,
     ...
  ],
  providers: [{ provide: FirestoreSettingsToken, useValue: {} }],
  bootstrap: [AppComponent]
})
export class AppModule { }