private void bunifuFlatButton4_Click(object sender, EventArgs e)
        {
            coffe_shop c = new coffe_shop();

            this.Hide();
            c.Show();
        }
        private void button_exit_Click(object sender, EventArgs e)
        {
            coffe_shop f = new coffe_shop();

            this.Hide();
            f.Show();
        }