How to use the angular-calendar-scheduler.SchedulerModule.forRoot function in angular-calendar-scheduler

import { AppService } from './services/app.service';

import { MatProgressSpinnerModule } from '@angular/material';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    CalendarModule.forRoot({
      provide: DateAdapter,
      useFactory: adapterFactory
    }),
    SchedulerModule.forRoot({ locale: 'en', headerDateFormat: 'daysRange' }),
    MatProgressSpinnerModule
  ],
  providers: [
    AppService,
    { provide: LOCALE_ID, useValue: 'en-US' }
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }