def addUser(self):
     postgres = Postgres()
     login = self.loginEntry.get()
     password = self.passwordEntry.get()
     role = self.roleEntry.get()
     badInput = False
     errorMessage = "Пожалуйста, введите"
     if not login:
         errorMessage += " логин"
         badInput = True
     if not password:
         errorMessage += " пароль"
         badInput = True
     if not role:
         errorMessage += " роль"
         badInput = True
     if badInput:
         answer = mb.showerror(parent=self.window, message=errorMessage)
     else:
         postgres.addUser(login, password, role)
         self.update()