The updated user data will continue to be retrievable via the
sb. object. The other user metadata is entirely defined by the dictionary you create during the
As an alternative, you could create a single group channel for your app that contains all the users that are currently in a call. Invoke
groupChannel.join() when a call starts, invoke
groupChannel.leave() when a call ends, and use
groupChannel.members to get the list of who is currently in a call. With this you can check if the user you are calling is in a call.