public static List<User> getUserList()
{
List<User> users = new List<User>();
// TODO: replace this list with getting and creating users
// from SQL information
User a = new Doctor();
a.username = "******";
a.password = "******";
User b = new Volunteer();
b.username = "******";
b.password = "******";
User c = new OfficeStaff();
c.username = "******";
c.password = "******";
User d = new MedStaff();
d.username = "******";
d.password = "******";
User e = new Admin();
e.username = "******";
e.password = "******";
users.Add(a);
users.Add(b);
users.Add(c);
users.Add(d);
users.Add(e);
return users;
}