In order to connect your Partnerize affiliate account to Afflytics, you will need your Partnerize Application Key and API Key.
You can obtain these by visiting https://console.partnerize.com/login, logging into your account, and going to the main, drop-down and clicking "Account Settings"
From here, you'll want these two fields:
Click the eye to reveal them, and copy them inside of Afflytics.
Click Connect, and you're done!