@IBAction func saveChangesPressed(_ sender: UIButton) { let user = Auth.auth().currentUser if let user = user { let db = Firestore.firestore() let docRef = db.collection("Users").document(user.uid) docRef.updateData(["Name": self.nameField.text ?? "User","Email": self.emailField.text ?? "a@gmail.com", "MobileNumber": self.phoneNumberField.text ?? "123"]) } }