How to get currently logged in auth state/user from angularfire2

Question

I have an ionic2 app and am using Firebase and angularFire2. I\'d like to get the current authentication state and current auth object/user from firebase using angularFire2.

Answer 1

1. Import: import { AngularFireAuth } from 'angularfire2/auth';
2. Inject: constructor(public afAuth: AngularFireAuth) { }

3. Check:

   this.afAuth.authState.subscribe(res => {
     if (res && res.uid) {
       console.log('user is logged in');
     } else {
       console.log('user not logged in');
     }
   });