Access "aud" claim in resolver mapping for AWS AppSync

Hi, Sorry to crash this thread. Just wondering are you using AppSync GraphQL for the above case? And if so, are you calling your GraphQL Api directly from an external client via the GQL Api https://....../graphql URL? I am having an issue such that I am calling my GraphQL Api (testing via postman) via the https:// end-point. I am using AccessKey/SecretKey/Session token in the postman Authorization setting. I can hit the Api, and the resolver can see the incoming payload. However, my payload does NOT contain the "identity" property. The "augments" property is there, but not the "identity". According to documentation, if using AWS_IAM authentication, the "identity" should be there.