How to get a list of users who are currently connected to Firebase?

Question

Android

Found a solution: stackoverflow.com/questions/15982215/firebase-coun... ", it works, but in some cases, when the user logs out "in a different way" from the application, this way does not delete the session (row in Firebase) about the user , and it turns out that he is online.Is there any way to get a list of connected users directly from Firebase, through the API?