@Override
    public Set<String> getAllowedSigningAlgorithms(final OAuthRegisteredService registeredService) {
        return this.discoverySettings.getIdTokenSigningAlgValuesSupported();
    }
This is {@link OidcIdTokenSigningAndEncryptionService}.

@author Misagh Moayyed
@since 5.1.0
support/cas-server-support-oidc-core-api/src/main/java/org/apereo/cas/oidc/token/OidcIdTokenSigningAndEncryptionService.java