Use of unresolved identifier 'metadata' - ios

Question

I have this code, but I have a problem, because it writes me Use of unresolved identifier 'metadata', Thanks in advance! I am a beginner in Xcode, so please explain well!
I got this out of in a youtube tutorial, from zero2launch!
import UIKit
import FirebaseDatabase
import FirebaseAuth
import FirebaseStorage
class SignUpViewController: UIViewController {
#IBOutlet weak var ProfileImage: UIImageView!
#IBOutlet weak var UsernameField: UITextField!
#IBOutlet weak var PasswordField: UITextField!
#IBOutlet weak var Mailfield: UITextField!
var selectedImage: UIImage?
#IBAction func dismiss_onClick(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
ProfileImage.layer.cornerRadius = 40
ProfileImage.clipsToBounds = true
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(SignUpViewController.handleSelectProfileImageView))
ProfileImage.addGestureRecognizer(tapGesture)
ProfileImage.isUserInteractionEnabled = true
}
#objc func handleSelectProfileImageView() {
let pickerController = UIImagePickerController()
pickerController.delegate = self
present(pickerController, animated: true, completion: nil)
}
#IBAction func SignUpButton(_ sender: Any) {
Auth.auth().createUser(withEmail: Mailfield.text!, password: PasswordField.text! , completion:{(user: User?, error:Error?) in
if error != nil {
print(error!.localizedDescription)
return
}
let uid = user?.uid
let storageRef = Storage.storage().reference(forURL: "gs://gibble-2bed4.appspot.com").child("profile_image").child(uid!)
if let profileImg = self.selectedImage, let imageData = UIImageJPEGRepresentation(profileImg, 0.1){
storageRef.putData(imageData, metadata: nil, completion: { (matadata, error) in
if error != nil{
return
}
let profileImageUrl = metadata?.downloadURL()?.absoluteString
let ref = Database.database().reference()
let usersReference = ref.child("users")
let newUserReference = usersReference.child(uid!)
newUserReference.setValue(["username" : self.UsernameField.text!, "email": self.Mailfield.text!, "profileImageUrl": profileImageUrl])
})
}
})
}
}
extension SignUpViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
print("did Finish picking Media")
if let image = info["UIImagePickerControllerOriginalImage"] as? UIImage{
selectedImage = image
ProfileImage.image = image
dismiss(animated: true, completion: nil)
}
print(info)
}
}

Answer 1

You initialised matadata instead of metadata (which you want to use) in the closure in your following code (first line: "(matadata, error)"):
storageRef.putData(imageData, metadata: nil, completion: { (matadata, error) in
if error != nil{
return
}
let profileImageUrl = metadata?.downloadURL()?.absoluteString
The metadata in the last line should be matadata or you have to change it in the first line.