if titleTextField.text.isEmpty == false {
            if let result = DataManager.shared.quizController.joinQuiz(id: titleTextField.text) {
                switch result {
                case .badCode :
                    self.showErrorAlert(message: "Bad code")
                case .joined:
                    self.showErrorAlert(message: "You are alredy joined")
                case .notJoined:
                    navigationController?.popToRootViewController(animated: true)