public string AuthenticateUser(IAuthPackage authPackage)
        {
            DataForm df = new DataForm();

            df.SetValue("LoginName", authPackage.LoginName);
            df.SetValue("Password", authPackage.Password);

            string sid = USServiceClient.CreateUserState(df.ToString(), string.Empty, string.Empty, string.Empty, string.Empty);

            if (!String.IsNullOrEmpty(sid) && sid.Length >= 30)
            {
                SetAuthenticationTicket(sid, authPackage.LoginName);
            }

            return(sid);
        }