List group members

Returns a paginated list of the group's members. Use cursor pagination via after/before. Pass expand[]=user to embed each member's full user record and expand[]=total_count to include the matching row count. Pass query[] (repeatable, 1-255 chars) to search members by their user's email or federated credential subject (substring match, OR'd across repeated values). Pass filter[id] (repeatable, max 100) to restrict results to a known set of members by user ID — mutually exclusive with after/before (returns 400 if combined). When filter[id] is set, limit is ignored and the response contains every requested member that exists in the group, in a single page. IDs not in the group are silently omitted.