类型'AuthDataResult'的值没有成员'uid'仍然不起作用

Question

我尝试构建一个应用，但出现命名错误。

import UIKit
import Firebase

class signupViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var imageView: UIImageView!
    @IBOutlet weak var ihrNameTextField: UITextField!
    @IBOutlet weak var seinNameTextField: UITextField!
    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var passwortTextField: UITextField!
    @IBOutlet weak var erneutPasswortTextField: UITextField!

    let picker = UIImagePickerController()
    var userStorage: StorageReference!



    override func viewDidLoad() {
        super.viewDidLoad()

        picker.delegate = self

        let storage = Storage.storage().reference(forURL: "gs://hochzeitscountdown-38c20.appspot.com")
        userStorage = storage.child("user")

    }
    @IBAction func selectImagePressed(_ sender: Any) {
        picker.allowsEditing = true
        picker.sourceType = .photoLibrary

        present(picker, animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
            self.imageView.image = image
        }
        self.dismiss(animated: true, completion: nil)
    }


    @IBAction func anmeldenPressed(_ sender: Any) {

        guard ihrNameTextField.text != "", seinNameTextField.text != "", emailTextField.text != "", passwortTextField.text != "" else {return}

        if passwortTextField.text == erneutPasswortTextField.text {
            Auth.auth().createUser(withEmail: emailTextField.text!, password: passwortTextField.text!, completion: {(user, error) in
                if let error = error {

                    print(error.localizedDescription)}

                if let user = user {

                    let imageRef = self.userStorage.child("\(user.uid).jpg")
                }


            })
        } else {
            print("Passwörter sind nicht identisch.")
        }
    }
}

我仍然收到此错误：

  

'AuthDataResult'类型的值没有成员'uid'