guard let image = profilePicture.image else { return }
     guard let password = passwordField.text else { return }
     guard let email = emailField.text else { return }
    // guard let username = usernameField.text else { return }


    SVProgressHUD.show()
    Auth.auth().createUser(withEmail: email, password: password) { (user, error) in
        if error != nil{
            SVProgressHUD.dismiss()
            let alert = UIAlertController(title: "Error", message: "Please insert a valid email address and a password of at least 6 characters", preferredStyle: UIAlertController.Style.alert)
            alert.addAction(UIAlertAction(title: "Try again", style: UIAlertAction.Style.default, handler: nil))
            self.present(alert, animated: true, completion: nil)
            self.emailField.text = ""
            self.passwordField.text = ""
        }

        if let user = Auth.auth().currentUser{

            let imageName = NSUUID().uuidString
            let storageRef = Storage.storage().reference().child("(user.uid)/(imageName).jpeg")

            if let uploadData = image.jpegData(compressionQuality: 0.75){

                storageRef.putData(uploadData, metadata: nil, completion: { (metadata, error) in
                    if error != nil{
                        print(error!)
                        return
                    }
                    print(metadata ?? "success")

                    storageRef.downloadURL(completion: { (url, error) in
                        guard let downloadURL = url else {
                            print("an error occured after uploading and then getting the URL")
                            return
                        }

                        let changeRequest = Auth.auth().currentUser?.createProfileChangeRequest()
                        changeRequest?.photoURL = downloadURL
                        changeRequest?.commitChanges { (error) in
                            //handle error
                        }

                    })


                    SVProgressHUD.dismiss()
                })
            }
            }


           // print("Registration succesful")
           // SVProgressHUD.dismiss()

    }


}

guard let uid = Auth.auth().currentUser?.uid else { return }
    let databaseRef = Database.database().reference().child("users/profile/(uid)")

    let userObject = [
        "photoURL": profileImageURL.absoluteString
    ] as [String:Any]

    databaseRef.setValue(userObject) { error, ref in
        completion(error == nil)
    }
}