Kotlin firebase executed with addOnSuccessListener even if fails I have this piece of code and it is executed with .continueWith and addOnSuccessListener even if failed.I try with continueWithTask but i dont understand very well Tasks API. Please help me to understand how to do this. db.collection(customGameName).document().get().continueWith { if (!gameslist.contains(customGameName)) { gameslist.add(customGameName) SavedPreference.setGamesList(this, gameslist) adapter.notifyDataSetChanged() }else{...