As far as I know there is no way to send RestFullAPI role as Radius attribute to Extreme Wing controllers.
The only way is to create local RestFullAPI user, send reject from RADIUS for that user and use Fallthrough method on WING.
Can you add a Radius attribute for RestFullAPI role?
Best answer by Chris Kelly
For feature requests and enhancements, you’ll need to contact GTAC and make the request.
And no, I don’t see that there’s a way either to configure a RADIUS attribute for a user role via the API.