code: public void initialize(Context context, ResponseListener listener) {
          this.context = context;
          this.listener = (listener != null) ? listener : new ResponseListener() {
              final String message = "ResponseListener is not specified. Defaulting to empty listener.";
  
              @Override
              public void onSuccess(Response response) {
                  logger.debug(message);
              }
  
              @Override
              public void onFailure(Response response, Throwable t, JSONObject extendedInfo) {
                  logger.debug(message);
              }
          };
  
          logger.debug("AuthorizationRequestAgent is initialized.");
      }
docs: Initializes the request manager.
  
  @param context  Context to be cached and passed to challenge handlers later.
  @param listener Response listener. Called when an authorization response has been processed.