@Override
 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
     throws IOException, ServletException {
   if (gerritAuthFilter.doFilter(webSession, request, response, chain)) {
     super.doFilter(request, response, chain);
   }
 }
 @Override
 protected UserModel getUser(HttpServletRequest httpRequest) {
   UserModel userModel = gerritAuthFilter.getUser(httpRequest);
   if (userModel == null) {
     return super.getUser(httpRequest);
   } else {
     return userModel;
   }
 }