[keycloak-user] Mapping SAML response elements to OIDC token claims

Hi Is it possible to map SAML response elements from an IDP response to claims in the OIDC information? We're specifically looking to be able to extract the AuthenticatingAuthority, which I can see is returned in the AuthnContext element, but I'm not sure if the Attribute name or Friendly Attribute name in the SAML mapper will look for those. Thanks Matt