private void btnLogin_Click(object sender, RoutedEventArgs e) { User user = new User(tbEmail.Text.Trim(), tbPassword.Password.Trim(), Helpers.ConverCheckedToInt(cbRememberPass)); if (UserDatabase.CheckAccount(user.Email, user.Password)) { UserDatabase.Update(user, user.Email); MainControl m = new MainControl(user, AccessToken); Window.GetWindow(this).Hide(); m.Show(); } else { Helpers.MakeErrorMessage(Window.GetWindow(this), "Error join app", "Error"); } }