def security(self):
        """returns an object to work with the site security"""
        if self._resources is None:
            self.__init()
        if "security" in self._resources:
            url = self._url + "/security"
            return _security.Security(url=url,
                                      securityHandler=self._securityHandler,
                                      proxy_url=self._proxy_url,
                                      proxy_port=self._proxy_port,
                                      initialize=True)
        else:
            return None
returns an object to work with the site security