text: #ifndef LOGIN_H
  #define LOGIN_H
  
  #include <QWidget>
  #include "mainwindow.h"
  
  namespace Ui {
  class Login;
  }
  
  class Login : public QWidget
  {
      Q_OBJECT
  
  public:
      explicit Login(QWidget *parent = nullptr);
      ~Login();
  
  private slots:
      void on_pushButton_2_clicked();
  
      void on_pushButton_clicked();
  signals:
      void login_success();
  
  private:
      Ui::Login *ui;
      MainWindow m;
  };
  
  #endif // LOGIN_H
  