code: def add(self, objects, object_type=None, **kwds):
          
          result = self._client.album.add(self, objects, object_type, **kwds)
          self._replace_fields(result.get_fields())
          self._update_fields_with_objects()
docs: Endpoint: /album/<id>/<type>/add.json
  
          Add objects (eg. Photos) to this album.
          The objects are a list of either IDs or Trovebox objects.
          If Trovebox objects are used, the object type is inferred
          automatically.
          Updates the album's fields with the response.