In order to connect your Ebay Partner Network affiliate account to Afflytics, you will need your Ebay Partner Network Account SID and Auth Token.
You can obtain your Account SID and Auth Token by visiting https://partner.ebay.com/bla/eBay-Partner-Network/login.user, logging into your Ebay account, and navigating to the API page. On the bottom left of the screen click the cloud icon, then click "API". See screenshot.
Once on the API page, copy your Ready-Only Account SID and Read-Only Auth Token.
Once you have your Account SID and Auth Token, you can connect your Ebay Partner Network account to Afflytics by clicking "Connect" under the Ebay Partner Network logo on the Afflytics Setup page.