             }
             // [END firebase_auth_anonymous]
           }
+        }
+      case .authApple:
+        if #available(iOS 13, *) {
+          action = UIAlertAction(title: "Apple", style: .default) { (UIAlertAction) in
+            self.startSignInWithAppleFlow()
+          }
+        } else {
+          continue
         }
       case .authFacebook:
         action = UIAlertAction(title: "Facebook", style: .default) { (UIAlertAction) in

    }
    tableView.reloadData()
  }
}


    showAuthPicker([
      AuthProvider.authEmail,
      AuthProvider.authAnonymous,
      AuthProvider.authApple,
      AuthProvider.authGoogle,
      AuthProvider.authFacebook,
      AuthProvider.authTwitter,
