Please add support for Amazon Bedrock API keys as a native authentication method alongside the existing assume-role and static IAM access key options.

AWS now supports service-scoped Bedrock API keys (both long-term and 30-day short-term). Allowing users to store a Bedrock API key as a Port secret and authenticate directly via the AWS_BEARER_TOKEN_BEDROCK mechanism would remove the need for cross-account roles or broad IAM keys. This significantly reduces the security blast radius and simplifies credential rotation.