private void button1_Click(object sender, EventArgs e)
        {
            Login_Form lf = new Login_Form("admin");

            lf.Show();
            this.Close();
        }
        private void user_login_Click(object sender, EventArgs e)
        {
            Login_Form lf = new Login_Form("user");

            lf.Show();
            this.Close();
        }