The API version date as documented here; e.g. 20231010

can be created (lists created by this user), edited (other people's lists this user has edited), followed (lists this user follows), friends (lists from this user's friends), and suggested (lists relevant to the user's current location).

The latitude/longitude around which to retrieve place information. This must be specified as latitude,longitude (e.g., ll=41.8781,-87.6298). Required in order to receive the suggested group.