code: def _register_endpoints(self, providers):
          
          url_map = []
  
          for endp_category in self.endpoints:
              for binding, endp in self.endpoints[endp_category].items():
                  valid_providers = "|^".join(providers)
                  parsed_endp = urlparse(endp)
                  url_map.append(("(^%s)/\S+/%s" % (valid_providers, parsed_endp.path),
                                  functools.partial(self.handle_authn_request, binding_in=binding)))
  
          return url_map
docs: See super class satosa.frontends.base.FrontendModule#register_endpoints
  
          :type providers: list[str]
          :rtype list[(str, ((satosa.context.Context, Any) -> satosa.response.Response, Any))] |
                 list[(str, (satosa.context.Context) -> satosa.response.Response)]
          :param providers: A list with backend names
          :return: A list of url and endpoint function pairs