To disable the client computing the payload hash and use [Unsigned Payload](https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html) request signature add [v4.SwapComputePayloadSHA256ForUnsignedPayloadMiddleware](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws/signer/v4#RemoveComputePayloadSHA256Middleware).