throws AuthenticationException, ServletException, IOException {
try {
LamClient LC = new LamClient(); // TODO: configure LamClient
String sUserName = LC.force_authenticate(request, response);
if (sUserName == null || sUserName.equals("")) {
return null;
} else {
String sUserId = AuthenticationData.getUserId(conn, sUserName);
if ("-1".equals(sUserId)) {