private void button1_Click(object sender, EventArgs e)
        {
            int privilege = controllerObj.CheckPassword(textBox1.Text, textBox2.Text);

            if (privilege == 1)
            {
                ManagerForm ChildForm = new ManagerForm();
                this.Hide();
                ChildForm.Show();
            }
            else if (privilege == 2)
            {
                CashierPersonForm ChildForm = new CashierPersonForm();
                this.Hide();
                ChildForm.Show();
            }
            else if (privilege == 3)
            {
                ChefForm ChildForm = new ChefForm();
                this.Hide();
                ChildForm.Show();
            }
            else if (privilege == 4)
            {
                SupervisorForm childform = new SupervisorForm();
                this.Hide();
                childform.Show();
            }
            else
            {
                MessageBox.Show("Please enter a correct Username and Password");
            }
        }