AngularFireAuth.authState provides you an Observable<firebase.User> to monitor your application's authentication State.
AngularFireAuth.auth returns an initialized
firebase.auth.Auth instance, allowing you to log users in, out, etc. See
the Firebase docs for more information on what methods are available.
Example app:
import { Component } from '@angular/core'; import { AngularFireAuth } from 'angularfire2/auth'; import * as firebase from 'firebase/app'; @Component({ selector: 'app-root', template: ` <div *ngIf="afAuth.authState | async as user; else showLogin"> <h1>Hello {{ user.displayName }}!</h1> <button (click)="logout()">Logout</button> </div> <ng-template #showLogin> <p>Please login.</p> <button (click)="login()">Login with Google</button> </ng-template> `, }) export class AppComponent { constructor(public afAuth: AngularFireAuth) { } login() { this.afAuth.auth.signInWithPopup(new firebase.auth.GoogleAuthProvider()); } logout() { this.afAuth.auth.signOut(); } }
Learn how to setup Firebase Authentication with Cordova in the Firebase Guides.