idTokenSignedResponseAlgString
@SerialName(value = "id_token_signed_response_alg")
OIDC Registration: OPTIONAL. JWS alg algorithm REQUIRED for signing the ID Token issued to this Client. The value none MUST NOT be used as the ID Token alg value unless the Client uses only Response Types that return no ID Token from the Authorization Endpoint (such as when only using the Authorization Code Flow). The default, if omitted, is RS256. The public key for validating the signature is provided by retrieving the JWK Set referenced by the jwks_uri element from OpenID Connect Discovery 1.0.