def external_ids(self, **kwargs):
path = self._get_series_id_season_number_path('<STR_LIT>')<EOL>response = self._GET(path, kwargs)<EOL>self._set_attrs_to_values(response)<EOL>return response<EOL>
Get the external ids that we have stored for a TV season by season
number.

Args:
    language: (optional) ISO 639 code.

Returns:
    A dict respresentation of the JSON returned from the API.