resolve(): Observable<any> | Promise<any> | any {

    let T = mergeMap((user: firebase.User) => { console.log('T in PIPE'); console.log(user); return Observable.fromPromise(user.getIdToken()) });

    let D = mergeMap((token: string) => { console.log('D in PIPE'); console.log(token); return this.http.get('https://myfakedomain.com/user?access_token=' + token) });

    let P = this.afAuth.authState // return Observable<User>

    .pipe(

    T, D

    )

    return P;

    }

ngOnInit() {

    let T = mergeMap((user: firebase.User) => { console.log('T in PIPE'); console.log(user); return Observable.fromPromise(user.getIdToken()) });

    let D = mergeMap((token: string) => { console.log('D in PIPE'); console.log(token); return this.http.get(' https://myfakedomain.com/user?access_token=' + token) });

    let P = this.afAuth.authState // return Observable<User>

    .pipe(

    T, D

    ).subscribe(data => this.myData = data);

    }