     }
 
     // MARK: Keyboard Handlers
+
     override func keyboardWillShow(_ notification: Notification) {
         if let keyboardSize = ((notification as NSNotification).userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
             visibleViewBottomConstraint.constant = keyboardSize.height

    }

    // MARK: Loaders
    func startLoading() {
        textFieldUsername.alpha = 0.5
        textFieldPassword.alpha = 0.5

    }

    // MARK: IBAction

    func authenticateWithUsernameOrEmail() {
        let email = textFieldUsername.text ?? ""
        let password = textFieldPassword.text ?? ""
