code: @GetMapping(path = CasProtocolConstants.ENDPOINT_VALIDATE)
      protected ModelAndView handle(final HttpServletRequest request, final HttpServletResponse response) throws Exception {
          return super.handleRequestInternal(request, response);
      }
docs: Handle model and view.
  
  @param request  the request
  @param response the response
  @return the model and view
  @throws Exception the exception