AUTH_TOKEN_VERIFICATION_FAILURE generally happens when Appstore SDK is not able to verify the Authentication token sent from Amazon servers. This generally happens when Public key (PEM file) is not available in the App. Kindly follow the steps mentioned in https://developer.amazon.com/docs/in-app-purchasing/integrate-appstore-sdk.html#configure_key to configure the key. Thanks!
Did you solve it?I also encountered the same problem
So, after lots of investigation I finally made it working!
Here what you need to know, to make Production mode working:
1) It only works in Life App Testing! So Production mode will work only for apk that was downloaded from the store during LAT.
2) Make sure, that your AppstoreAuthenticationKey.pem is up to date. I my case for some reason it has changed after I initially downloaded it.
3) Follow other documentation guides.
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