AwsSdkAdapter default using credential resolver
AwsSdkAdapter default using credential resolver

In the current behavior,
you can not use instance profiles and task role
in the instance that creates the sitemap.

aws-sdk-ruby v2 is auto detected using credentials.

According to the behavior of aws-sdk-ruby v2
unless you specify anything,
explicitly specify that you use the specified credentials.

Backwards compatibility is preserved because
environment variables are used in the
default behavior of aws-sdk-ruby v2.

kjvarga/sitemap_generator