code: def register_service(self, url, data=None, overwrite=True):
          
          data = data or {}
  
          args = dict(data)
          args['url'] = url
          service = Service(**args)
          service = self.store.save_service(service, overwrite=overwrite)
          return service.params
docs: Implementation of :meth:`twitcher.api.IRegistry.register_service`.