Add custom query parameter to presigned S3 URL

[osbornk]

I see this issue for the old version of the SDK. But with the V2 SDK how do I add a custom query parameter to my presigned URL.

The signing happens here: https://github.com/aws/aws-sdk-go-v2/blob/service/s3/v1.30.0/service/s3/api_op_GetObject.go#L566

But I am unclear how I would add my custom query parameter. I would appreciate any help.