I am still having some trouble with getting the number of users connected to a room. I am using app42 cloud and the code is like this ( unity3d in c#) Listener listen; Addlisteners........ Public string users; Public byte result; Public AllUsersEvent eventOnlineUsr; Appwarp.GetInstance().getOnlineUsers () ; Listen.onGetOnlineUsersDone( eventOnlineUsr); The code does not produce errors but the values of the srring of the users and the value of the function onGetOnlineUsersDone() (result) are not updated. I am able to understand the observer patterns used for your app, but I do not know how to do it properly in sintaxis. I will apreciate some help in this topic or some examples because I want to retrieve the number of users conected always in each iteration. Yours faithfully.