5-user-authentication.md

5. User authentication

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 availabile.

Example app:

import { Component } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { AngularFireAuth } from 'angularfire2/auth';
import * as firebase from 'firebase/app';

@Component({
  selector: 'app-root',
  template: `
  <div> {{ (user | async)?.uid }} </div>
  <button (click)="login()">Login</button>
  <button (click)="logout()">Logout</button>
  `,
})
export class AppComponent {

  user: Observable<firebase.User>;

  constructor(public afAuth: AngularFireAuth) {
    this.user = afAuth.authState;
  }

  login() {
    this.afAuth.auth.signInWithPopup(new firebase.auth.GoogleAuthProvider());
  }

  logout() {
    this.afAuth.auth.signOut();
  }
}

Cordova

Learn how to setup Firebase Authentication with Cordova in the Firebase Guides.