List the members of a conversation

Lists the creators in a conversation: a direct thread's one creator, or a group's roster sorted by name (the first 2,000; the counts stay exact), each with their org creator id, reachable — whether they can read the conversation yet — and isMarketplaceCreator, whether you hired them through the marketplace. memberCount counts the creators who can: they joined your organization or hold a pending invitation. pendingMemberCount counts those not yet invited to the platform, who see a group once invited.