List messages within a Linkedin thread. Supports cursor pagination via last_key: make the first request without it, then if the response last_key is non-null, URL-encode the JSON cursor and pass it as ?last_key= on the next request. Repeat until last_key is null.
Pagination cursor. Take the last_key object from the previous response, JSON-stringify it, then URL-encode it (e.g. encodeURIComponent(JSON.stringify(last_key))) and pass it here. Omit on the first request. When the response last_key is null, you have reached the end.
Cursor for the next page. null when there are no more results. When non-null, pass it back as the last_key query parameter (URL-encoded JSON) to fetch the next page.
