Fireche
Add "Action:Logging out" (rex_firebase_authentication) under "Condition:On kicked" (rex_firebase_singleLogin) to logging out.
"Condition:On kicked" (rex_firebase_singleLogin) is only a signal to tell current user that he had been kicked.
I will add more words for this action, thanks for reply.
rex_firebase_singleLogin can also detect multiple login of parse since login with parse also could get an userID.