OperationAssertionChallenge

Challenge an existing credential signs. Used by every ceremony that authorizes an operation rather
than creating a credential.

{
    "challenge": "string",
    "relyingPartyId": "string",
    "relyingPartyName": "string",
    "allowCredentials": [
        {
            "kind": "webAuthn",
            "id": "string"
        }
    ]
}