private void btnSave_Click(object sender, EventArgs e)
{
string reason = inputReason.Text;
string osn = inputOsn.Text;
Documents.CreateLeaveOrder(
DateTime.Now, DateTime.Now, DateTime.Now,
personalNumber, fullName, department, position, reason, osn
);
panelMenu.OpenChildForm(new FormStaff(panelMenu, database));
database.removeUser(personalNumber, fullName);
}