private void AddUserButton_Click(object sender, EventArgs e)
        {
            AddUserForm addUserForm = new AddUserForm(userDataGridView);

            addUserForm.Visible = true;
        }
 private void AddUserButton_Click(object sender, EventArgs e)
 {
     AddUserForm addUserForm = new AddUserForm(userDataGridView);
     addUserForm.Visible = true;
 }