Work with OData secured service

Question

I want to generate entity classes and Service class of OData secured service. In OData Java extension page it is written that I need to use org.restlet.ext.odata.Generator class that should get uri and output directory parameters. But if my OData service is secured the generator instance is not able to generate service classes without username and password of the service. I did not find any way to pass username and password to generator class.

I get 401 HTTP response code.

Please help.