[Freeswitch-users] Callcenter saying position in queue

Hello. I want to configure callcenter in so way, that every member in queue will hear periodically its position in queue. This may be done using lua script and using uuid_broadcast. But how in lua script get the members position? From callcenter_config queue list members [queue_name] cant find any position. Even base_score is always 0 for all members using <param name="time-base-score" value="system"/> in callcenter configuration. Thank you.