In Pubnub how to make two subscribers subscribed to a channel member of a group, to subscribe each other using object listeners in javascript?

Question

Me and my team mate created a app using pubnub server. We need to add a function where it should make subscribers who are members of a channelgroup, need to subscribe eachother while joining the group using object listeners in membership handling.

I tried a function usinf pubnub.herenow and presence event, but it doesn't seems to work.