Support for AssumeRoleWithWebIdentity

[vlieven]

Hello!

Would it be possible to add support for authenticating using AssumeRoleWithWebIdentity?

We want to use paws inside containers orchestrated by Kubernetes (which acts as OpenID Connect provider), so essentially I'm looking for support for the AWS_WEB_IDENTITY_TOKEN_FILE environment variable.

Relevant links:

• boto3 user reference
• Python implementation

Thanks!