Hi, I have a question about the new pagination in ORY Kratos. How exactly do we use page_token? Documentation says it's a number, but when I do an /identities/list request with page_size=500 and page_token=1, I get the following error: {"error":{"code":500,"status":"Internal Server Error","message":"unable to fetch records: ERROR: invalid input syntax for type uuid: \"1\" (SQLSTATE 22P02)"}} /identities/list does not return any tokens, so where do I get it please?