subscribeToPresencesBy
fun subscribeToPresencesBy(userUris: List<String>, onCompletion: (Either<List<Presence>, SippoResourceError>) -> Unit)
Subscribes to the presence of each contact included in userUris.
Parameters
userUris
The UserUri list to subscribe to.
onCompletion
Callback that will be invoked when the request is completed. It will receive the presence list in case of success or a SippoResourceError otherwise.