Using Related Origin Requests for passkey logins

[maximecd]

Hello,

In my current setup, i have website-1.com that signs up users with a passkey. I'd like to be able to login on website-2.com using this same passkey.

In @account-kit/signer i am able to set custom credential options on signup, but not on sign in.

Here's how i'd like to do it on website-2.com :

const result = await signer.authenticate({
  type: 'passkey',
  createNew: false,
  // here i need a way to specify website-1.com as the RP id
})

Has anyone managed to do this, following this spec https://web.dev/articles/webauthn-related-origin-requests ?

Thanks.