//Show the staff within the system
private static void ListStaff()
{
MainEngine.PrintUserList(new StaffManager().StaffList.Cast <User>().ToList(), "--- List staff ---", "<no staff>");
}
//DONE
//Show the students within the system
private static void ListStudents()
{
MainEngine.PrintUserList(new StudentManager().StudentList.Cast <User>().ToList(), "--- List students ---", "<no students>");
}