Load testing Phoenix Presence

I came across Tsung from the official post by the Phoenix team and Tsung seems like the tool to use for load testing websockets.

Does Tsung allow load testing Phoenix presence, ie; Have a few thousand user accounts authenticate and connect to socket (and then the channel) to see their details in the Presence payload? If yes, I would greatly appreciate if you could point me to a resource OR an existing Tsung script that does the same.