AWS warning about public IAM credentials for SQS rendezvous

I got the following email from AWS:

We have become aware that the AWS Access Key AKIA5AIF4WJJXS7YHEG3 , belonging to IAM User SQS-client ,
along with the corresponding Secret Key is publicly available online at 
https://github.com/net4people/bbs/issues/335#issue-2157478835 . 

Your security is important to us and this exposure of your account’s IAM credentials poses a security 
risk to your AWS account, could lead to  excessive charges from unauthorized activity, and violates 
the AWS Customer Agreement or other agreement with us governing your use of our Services.

They probably have some automated tools to search for secret keys in Github repositories.

I have replied to the open support ticket to confirm that the sharing of credentials was intentional. Hopefully they will allow us to continue to use them.