Update the object.

def _update(self, resource, update_dict=None, params=None, **kwargs):
        """Update the object."""
        url = self._client._build_url(resource, **kwargs)
        response = self._client._request('PUT', url, json=update_dict, params=params)

        if response.status_code != requests.codes.ok:  # pragma: no cover
            raise APIError("Could not update {} ({})".format(self.__class__.__name__, response.json().get('results')))
        else:
            self.refresh()