code: public void startKeepAliveSender(String authToken) {
      this.token = authToken;
      stopKeepAliveSender();
  
      logger.info("Starting keepAlive Sender");
      future = scheduler.scheduleAtFixedRate(new Runnable() {
        public void run() {
          sendKeepAliveBridgeMessage(appId, bridgeId, token, httpClient);
        }
      }, 0, keepAliveInterval, TimeUnit.MILLISECONDS);
    }
docs: Start keep alive sender.
  
  @param authToken authentication token