vc实现图形界面登录功能，对于登录情况给于提示，并且登录三次失败，自动退出。-vc log function to achieve a graphical interface for the logs to the prompt, and three failed login, automatic withdrawal.

倾城多功能接口(登陆_内部注册_DNT接口)-Allure multifunction interface (log _ internal register _DNT interface)