@Override
public void onErrorResponse(VolleyError error) {
doingJoin = false;
if (onCompleteJoinListener != null) onCompleteJoinListener.onCompleteJoin(false);
}
@Override
public void onResponse(ResponseDefault response) {
doingJoin = false;
if (onCompleteJoinListener != null) onCompleteJoinListener.onCompleteJoin(true);
}