signOut() : firebase.Promise<any> {
    if (this.angularFireAuth.auth.currentUser.providerData.length) {
      for (var i = 0; i < this.angularFireAuth.auth.currentUser.providerData.length; i++) {
        var provider = this.angularFireAuth.auth.currentUser.providerData[i];

        if (provider.providerId == firebase.auth.GoogleAuthProvider.PROVIDER_ID) { // Se for o gooogle
          // o disconnect limpa o oAuth token e tambem esquece qual conta foi selecionada para o login
          return this.googlePlus.disconnect()
            .then(() => {
              return this.signOutFirebase();
            });
        } else if (provider.providerId == firebase.auth.FacebookAuthProvider.PROVIDER_ID) { // Se for facebook
          return this.facebook.logout()
            .then(() => {
              return this.signOutFirebase();
            })
        } else if (provider.providerId == firebase.auth.TwitterAuthProvider.PROVIDER_ID) { // Se for twitter
          return this.twitter.logout()
            .then(() => {
              return this.signOutFirebase();
            })
        }
      }
    }

    return this.signOutFirebase();
  }

 logout(){
     this.fb.logout().then((res) => 
     console.log('Logged into Facebook!', res)).catch(e => 
     console.log('Error logging into Facebook', e));
     this.googleplus.logout().then((res) => 
     console.log('logged out of google',res)).catch(err => console.error(err));
     localStorage.clear();
     this.navCtrl.setRoot(LoginPage);
  }

 signInWithGoogle() {
   return this.googlePlus.login({
     'webClientId': '638933829742-i0av628updkc723cb3gnirhh3b0829up.apps.googleusercontent.com',
     'offline': true
   })
     .then(res => {
       return this.angularFireAuth.auth.signInWithCredential(firebase.auth.GoogleAuthProvider.credential(res.idToken))
         .then((user: firebase.User) => {
           // atualizando o profile do usuario
           return user.updateProfile({ displayName: res.displayName, photoURL: res.imageUrl });
         });
     });
 }

 return new Promise((resolve, reject) => {
   if (this.plt.is('cordova')) {
     this.google
       .trySilentLogin({})
       .then(result => {
         let token = result.credential["accessToken"];
         resolve(result)
         this.loginJobs()
       })
       .catch(function (error) {
         reject(error)
         alert(error.message)
       });
   } else {
     reject('not cordova')
   }
 })

 return new Promise<FirebaseUserModel>((resolve, reject) => {
   if (this.platform.is('cordova')) {
     this.googlePlus.login({
       'scopes': '', // optional, space-separated list of scopes, If not included or empty, defaults to `profile` and `email`.
       'webClientId': environment.googleWebClientId, // optional clientId of your Web application from Credentials settings of your project - On Android, this MUST be included to get an idToken. On iOS, it is not required.
       'offline': true
     }).then((response) => {
       const googleCredential = firebase.auth.GoogleAuthProvider.credential(response.idToken);
       firebase.auth().signInWithCredential(googleCredential)
       .then((user) => {
         resolve();
       });
     },(err) => {
       reject(err);
     });
   }
   else{
     this.afAuth.auth
     .signInWithPopup(new firebase.auth.GoogleAuthProvider())
     .then((user) => {
        resolve()
     })
   }
 })