firebaseFirestore.collection("Posts").whereEqualTo("user_id",currentUserID).get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
@Override
 public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
  for(DocumentChange documentChange : queryDocumentSnapshots.getDocumentChanges()){
    if(documentChange.getType() == DocumentChange.Type.ADDED){
            ??
            }
        }
     }
});