tokenEndPointAuthSigningAlgValuesSupported
@SerialName(value = "token_endpoint_auth_signing_alg_methods_supported")
OPTIONAL. JSON array containing a list of the JWS signing algorithms ("alg" values) supported by the token endpoint for the signature on the JWT JWT used to authenticate the client at the token endpoint for the "private_key_jwt" and "client_secret_jwt" authentication methods. This metadata entry MUST be present if either of these authentication methods are specified in the "token_endpoint_auth_methods_supported" entry. No default algorithms are implied if this entry is omitted. Servers SHOULD support "RS256". The value "none" MUST NOT be used.