private void buttonLogin_Click(object sender, EventArgs e)
        {
            LoginDataAccess db = new LoginDataAccess();

            db.GetLogin(textBoxUserName.Text.Trim(), textBoxUserPassword.Text.Trim());

            if (LoginDataAccess.loginOutput == true)
            {
                db.SaveCurrentUser();

                MainForm objMenuGlowne = new MainForm();
                this.Hide();
                objMenuGlowne.Show();
            }
            else
            {
                MessageBox.Show("Check username or password");
            }
        }