public function getCustomAttributes($website = 0)
    {
        $attr = $this->scopeConfig->getValue(
            \Dotdigitalgroup\Email\Helper\Config::XML_PATH_CONNECTOR_MAPPING_CUSTOM_DATAFIELDS,
            \Magento\Store\Model\ScopeInterface::SCOPE_WEBSITE,
            $website->getId()
        );

        if (!$attr) {
            return [];
        }

        return $this->serializer->unserialize($attr);
    }