Combu 2.0.7 has been just released on our website and submitted to Asset Store for the review process. You can now load the online players in Unity, while in the administration console you will see how many players are currently online in the homepage and in Players you will be notified if a user in the list is currently online.
To allow this server side function it was added the new define ONLINE_SECONDS in config.php to be set with the same value you have CombuManager.onlineSeconds in Unity.