Getting transcriber to join a locked room


We have managed to successfully setup transcription function follow the guides and information on the web. There is one last hurdle however, if the room is locked, transcriber will not able to join the room. We found from another post here to put it in the SIP header, so the question is where can we find the password of the room in the first place? Or how should we approach this?

Any help would be much appreciated.