It's not always possible to sign the payload - especially when uploading large files to S3. That's why there exists [UNSIGNED-PAYLOAD](https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html). Unfortunately, `AWSRequestsAuth.get_aws_request_headers` does not support it.
It's not always possible to sign the payload - especially when uploading large files to S3. That's why there exists UNSIGNED-PAYLOAD.
Unfortunately,
AWSRequestsAuth.get_aws_request_headersdoes not support it.