angular app_initalizer didn't execute

i want to do some initialization and have a return of an obesrvable before my app start, so i write this code and put it in the app.module

function initializeApp(authService: AuthService) {
return () => authService.getUtilisateurConnecte();
}


`

providers: [
...
{
provide: APP_INITIALIZER,
multi: true,
useFactory: initializeApp,
deps: [AuthService],
},
],`


and the following is the function of authService

public getUtilisateurConnecte() { return new Promise(() => this.domiaGroupUserService.currentUser$).then((user: DomiarefUser) => { console.log('conected user ' + user?.given_name); });; }

but the inititialisation didn't complete and so the app didn't start. how can i handle this initialisation

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