Authenticating using IAM role when running inside EC2 instance

[hugeps]

Guys,

Is it possible to use this library so that instead of providing keys to authenticate to SM SDK you could instead utilise the IAM roles assigned to an executing EC2 instance or a container in ECS/EKS context?

As described here I think:
https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials_assume_role.html

[swilla]

The package does not specifically pass in credentials, so it in theory should work. Based on the AWS documentation, assumed roles are used if ENV variables are not set or a shared credentials file is not used:
https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html

Let me know if you have any issues getting it t work. We are more than happy to review any PRs needed to make this happen.