PHP integration
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.ebay.com/sell/marketing/v1/promotion
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.ebay.com/sell/marketing/v1/ad_campaign
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.ebay.com/sell/marketing/v1/ad_report_task