code: public static void addPaymentSettings(PaymentSettings paymentSettings) {
  		if (paymentSettings == null) {
  			logger.error("FbBotMill validation error: Payment Settings can't be null or empty!");
  			return;
  		}
  		FbBotMillNetworkController.postThreadSetting(paymentSettings);
  	}
docs: This method is used to add any payment settings needed.
  
  @param paymentSettings
  the payment settings object.
  @see <a
  href="https://developers.facebook.com/docs/messenger-platform/thread-settings/payment"
  >Payments settings</a>