Support for multiple environments in JavaFX + Spring Boot + Hibernate application

That is my solution, the only drawback is that I am not able to log in after unsuccessful login attempt. It works fine but if I first use incorrect login credentials and then correct ones it throws an exception saying that EntityManagerFactory is closed. (I do remove bean definitions in my catch block, just wanted to make code shorter)

@Component
public class LoginController implements Initializable, ApplicationContextAware{

    @FXML
    private AnchorPane login;
    @FXML
    private JFXTextField dbUsernameTextField;
    @FXML
    private JFXPasswordField dbPasswordTextField;
    @FXML
    private JFXTextField boxUsernameTextField;
    @FXML
    private JFXPasswordField boxPasswordTextField;
    @FXML
    private JFXComboBox<ComboItem> environmentComboBox;
    @FXML
    private JFXButton loginButton;
    @Autowired 
    private Environment environment;

    @Autowired
    private OrderService orderService;

    private AnnotationConfigApplicationContext context;
    @Override
    public void initialize(URL location, ResourceBundle resources) {
        loginButton.setDisable(true);
        List<ComboItem> envs=new ArrayList<ComboItem>();
        String[]environments=environment.getProperty("environments").split(",");
        for(String s:environments) {
            environmentComboBox.getItems().add(new ComboItem(s.toUpperCase(),s));
        }
        environmentComboBox.setConverter(new StringConverter<ComboItem>() {
            @Override
            public String toString(ComboItem object) {
                return object.getKey();
            }
            @Override
            public ComboItem fromString(String string) {
                return null;
            }
        });
    }

    @FXML
    public void selectEnvironment() {
        if(!environmentComboBox.getSelectionModel().isEmpty())
            loginButton.setDisable(false);
    }

    @FXML
    public void authenticate(ActionEvent actionEvent) {

        String boxUsername=boxUsernameTextField.getText();
        String boxPassword=boxPasswordTextField.getText();
        try {
            context.registerBean("dataSource",DataSource.class,()->dataSource());
            context.registerBean("sessionFactory", LocalSessionFactoryBean.class,()->sessionFactory());     
            context.registerBean("transactionManager",HibernateTransactionManager.class,()->getTransactionManager());

            Order order=orderService.findById("");

            FXMLLoader fxmlLoader=new FXMLLoader(getClass().getResource("/fxml/Main.fxml"));
            fxmlLoader.setControllerFactory(context::getBean);
            Parent rootNode=fxmlLoader.load();
            Stage stage=(Stage) login.getScene().getWindow();
            Scene scene=new Scene(rootNode,400,300);
            stage.setScene(scene);
            stage.setTitle("Login");
            stage.setMaximized(true);
            stage.show();
            stage.setOnCloseRequest(event->JSchConnection.close());
        }catch(Exception e) {
        context.removeBeanDefinition("dataSource");
        context.removeBeanDefinition("sessionFactory");
        context.removeBeanDefinition("transactionManager");

            e.printStackTrace();
        }

    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.context=(AnnotationConfigApplicationContext) applicationContext;       
    }

    private  Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.Oracle10gDialect");
        properties.put("hibernate.show_sql", "false");
        properties.put("hibernate.format_sql", "true");
        properties.put("hibernate.hbm2ddl.auto", "none");
        return properties;
    }

    public  DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("oracle.jdbc.OracleDriver");
        dataSource.setUrl("myurl");
        dataSource.setUsername(dbUsernameTextField.getText());
        dataSource.setPassword(dbPasswordTextField.getText());
        return dataSource;
    }

    public  LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[] { "com.mypackage" });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    public HibernateTransactionManager getTransactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(context.getBean(SessionFactory.class,"sessionFactory"));
        return transactionManager;
    }

}