This article explains how to share Amazon Ads access with Shopalyst Discovery Commerce Cloud.
Logon to Shopalyst and navigate to platform settings and click on the edit icon for amazon.
Click on the Reauthorize button
Login using Amazon advertiser account credentials on the upcoming popup window
Allow the sign in to get the account details added with Shopalyst
After the successful authentication application will be redirected to the Shopalyst Signal platform settings screen with credentials.