Does face swap still work?

I want to face swap a given face onto another which is already uploaded. I'm trying to complete the steps here:

But I get a 403 from https://api.heygen.com/v1/image/analyze. I've tried with 2 working API keys, I can't see it in your documentation.

body: JSON.stringify({ asset_id: assetId }),

assedId is from https://upload.heygen.com/v1/asset and the returned id is used.

Does this feature still work? Is there a better way to do it?

Thanks