...
import { HttpAuthorizationModule } from 'a4-http-authorization';
...
 
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    ...,
    HttpAuthorizationModule,
    ...
  ],
  ...
})

constructor(private httpAuthorizationService: HttpAuthorizationService) { }

this.httpAuthorizationService.setTokenCookieName('oauth-cookie');

this.httpAuthorizationService.setHttpAuthorizationCallback(req => {
  // your logic here
 
  return true; // return true to allow injector to inject the authorization header
               // return false and injector will not inject the authorization header
});

const header = this.httpAuthorizationService.getAuthorizationHeader();