private void ChangeLoginButton_Click(object sender, EventArgs e)
        {
            ChangeInformationForm form = new ChangeInformationForm(_reader, "Login");

            form.Show();
        }
        private void ChangeSurnameButton_Click(object sender, EventArgs e)
        {
            ChangeInformationForm form = new ChangeInformationForm(_reader, "Surname");

            form.Show();
        }