docs: public void handleSsoPostProfileRequest(final HttpServletResponse response,
                                              final HttpServletRequest request,
                                              final BaseHttpServletRequestXMLMessageDecoder decoder) throws Exception {
          val authnRequest = getSamlProfileHandlerConfigurationContext().getSamlHttpRequestExtractor()
              .extract(request, decoder, AuthnRequest.class);
          initiateAuthenticationRequest(authnRequest, response, request);
      }