A customer is attempting to create an interface for their users so they can see all their current and former tickets. They've done this but they'd also like to give them the opportunity to reply to a ticket from within this interface. At this time the API doesn't support such a feature as it would require them to set a user as an admin to add a reply to a message.

Possibly could we add an optional user_id parameter when creating a ticket message to create one on behalf of another user?