List <User> IUserManager.getUsers()
        {
            List <User> users = new List <User>();

            var userData        = new UserData.TabUserDataTable();
            var userDataAdapter = new TabUserTableAdapter();

            userDataAdapter.GetUsersBy(userData);

            foreach (DataRow dr in userData.Rows)
            {
                User newUser = new User();
                newUser.UID       = int.Parse(dr["UID"].ToString());
                newUser.userName  = dr["UserName"].ToString();
                newUser.password  = dr["Password"].ToString();
                newUser.userEmail = dr["UserEmail"].ToString();
                newUser.userLevel = int.Parse(dr["UserLevel"].ToString());
                users.Add(newUser);
            }

            return(users);
        }