public User(User u)
        {
            ID = u.ID;
            userName = u.userName;
            password = u.password;

            data = u.GetData();
            userGroups = u.GetUserGroups();
        }
        public User(short id, string uName, string pWord, string fName, string lName, List<UserGroup> ug)
        {
            ID = id;
            userName = uName;
            password = pWord;

            data = new UserDemographicData();
            data.SetFirstName(fName);
            data.SetLastName(lName);

            userGroups = ug;
        }