Optionalclient_Specify this to override the parent class's clientId
Optionalclient_Specify this to override the parent class's clientSecret
Optionalclient_Specify this to provide your own client assertion JWT rather than
the class creating one for you from the clientAssertionSigningKey.
Optionalclient_If you provide your own client_assertion you should also provide
the client_assertion_type.
The Refresh Token to use.
OptionalscopeA space-delimited list of requested scope permissions. If not sent, the original scopes will be used; otherwise you can request a reduced set of scopes.
Allow for any custom property to be sent to Auth0