The current RC does not remove any users from that list (unless the user is assigned to a different group), so the list will display whatever the CMD_API_SHOW_USERS API passes (should pass users and resellers owned by your account). I guess it could be modified to use DA's CMD_API_SHOW_ALL_USERS API.
If this is necessary, I will re-release 2.3rc6 and you can update to it again.
If this is necessary, I will re-release 2.3rc6 and you can update to it again.