tokenEndPointAuthMethodsSupported
@SerialName(value = "token_endpoint_auth_methods_supported")
OPTIONAL. JSON array containing a list of client authentication methods supported by this token endpoint. Client authentication method values are used in the "token_endpoint_auth_method" parameter defined in Section 2 of RFC7591. If omitted, the default is "client_secret_basic" -- the HTTP Basic Authentication Scheme specified in Section 2.3.1 of OAuth 2.0 RFC6749.