     }
 
     // MARK: IBAction
+
     func authenticateWithUsernameOrEmail() {
         let email = textFieldUsername.text ?? ""
         let password = textFieldPassword.text ?? ""

    }

    // 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
