AWS Credentials working in Sub-Prods but not in Production

Hello,

We have a requirement to feed resolved incident data into an AWS SQS queue. This implementation has been successfully tested and working in our Development & Test environments. However, after migrating these changes to our Production environment, we encountered an authorization error.

The specific error message is as follows: "User: anonymous is not authorized to perform: sqs:SendMessage on resource: arn:aws."

We have verified that the same aws credentials were used in both the Development and Production environments.

Could someone please assist us in resolving this authorization issue?

Thanks,
Anusha