public function getWebsiteSalesDataFields($website)
    {
        $subscriberDataFileds = [
            'website_name' => '',
            'store_name' => '',
            'number_of_orders' => '',
            'average_order_value' => '',
            'total_spend' => '',
            'last_order_date' => '',
            'last_increment_id' => '',
            'most_pur_category' => '',
            'most_pur_brand' => '',
            'most_freq_pur_day' => '',
            'most_freq_pur_mon' => '',
            'first_category_pur' => '',
            'last_category_pur' => '',
            'first_brand_pur' => '',
            'last_brand_pur' => ''
        ];

        $store = $website->getDefaultStore();
        $mappedData = $this->scopeConfig->getValue(
            'connector_data_mapping/customer_data',
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE,
            $store->getId()
        );

        $mappedData = array_intersect_key($mappedData, $subscriberDataFileds);
        foreach ($mappedData as $key => $value) {
            if (!$value) {
                unset($mappedData[$key]);
            }
        }
        return $mappedData;
    }