Hi Guys, I’ve installed Amazon Payments on my Shopify store, however when i test the Amazon payment checkout I get this error:

Error Summary
400 Bad Request
The redirect URI you provided has not been whitelisted for your application. Please add your redirect URI in the ‘Allowed Return URLs’ section under ‘Web Settings’ on the Amazon Seller Central App Console for Login with Amazon.

I can’t find the ‘web settings’ anywhere in the sellercentral.amazon.co.uk app. Any ideas how I can correct this error?

Thanks, Ben.
www.bondicoffee.com