private function addDefaultParametersToRequest($params)
	{
		// check if merchantAccount is setup in client and request is missing merchantAccount then add it
		if (!isset($params['merchantAccount']) && $this->service->getClient()->getConfig()->getMerchantAccount()) {
			$params['merchantAccount'] = $this->service->getClient()->getConfig()->getMerchantAccount();
		}

		return $params;
	}