Required. App package name to generate the token for (e.g. com.example.mygame).

Required. Persona to associate with the token. Persona is a developer-provided stable identifier of the user. Must be deterministically generated (e.g. as a one-way hash) from the user account ID and user profile ID (if the app has the concept), according to the developer's own user identity system.

Required. Opaque server-generated string that encodes all the necessary information to identify the PGS player / Google user and application. See https://developer.android.com/games/pgs/recall/recall-setup on how to integrate with Recall and get session ID.