code: public base_resource[] perform_operation(nitro_service service)  throws Exception
  	{
  		if (!service.isLogin() && !get_object_type().equals("login"))
  			service.login();
  		return post_request(service, null);
  	}
docs: Use this method to perform a any post operation ...etc
  operation on MPS resource.
  @param service nitro_service object.
  @return status of the operation performed.
  @throws Exception API exception is thrown.