STS authentication failing due to new sts endpoints

[JLPung]

Authentication will fail in some cases where the legacy sts endpoints are not available.
For example if we print the get_caller_identity endpoint url,

def get_caller_identity(session):
    sts_client = session.client("sts")
    print(sts_client.meta.endpoint_url)
    ......

we will get the following value back.

https://sts.amazonaws.com

However, if we want to use the newer sts endpoints such as the ones mentioned in the below document, we can't. Specifying region in the command line does not make scoutsuite use the newer sts endpoints as well.

https://docs.aws.amazon.com/general/latest/gr/sts.html

python3 .\scout.py aws --no-browser -r "ap-southeast-1"
2025-03-06 20:33:18 Work scout[11212] INFO Launching Scout
2025-03-06 20:33:18 Work scout[11212] INFO Authenticating to cloud provider
https://sts.amazonaws.com
https://sts.amazonaws.com
2025-03-06 20:33:22 Work scout[11212] INFO Exiting

There could be some configurations or options that I am missing. Please let me know.