logout() {
   //switch based on social login, could be better
   if(this.user.social && this.user.social.facebook) {
     this.facebookAuth.logout();
   } else {
     this.auth.logout();
   }
   this.navCtrl.setRoot(LoginPage);
 }

 logout() {
   this.facebookAuth.logout();
   this.user.clear();
   this.user.social.facebook.uid = null;
   this.currUser = {
     id: '0',
     name: ''
   };
   this.toastService.showToast('Successfully signed out');
 }

 authenticate() {
   this.facebookAuth.login().then(() => {
     this.currUser = {
       id: this.user.social.facebook.uid,
       name: this.user.social.facebook.data.full_name,
       photo: this.user.social.facebook.data.profile_picture
     };
     this.toastService.showToast('Successfully signed in');
   });
 }

 doFacebook() {
   console.log('do FB');
   this.facebookAuth.login().then(() => {
     this.navCtrl.setRoot(HomePage);
   });
 }