Changes to Sign with vault

removed dfns_entities.Fido2CredentialFactor dfns_entities.KeyCredentialFactor from the signature/firstFactor request property oneOf list

the signature/firstFactor request property type changed from no type to object

added the new optional header request parameter Due-Delegated-User-Id to all path's operations

added the new optional request property signature/firstFactor/Factor

removed discriminator from signature/firstFactor request property