Extend claims on AppServer/auth/apphost response

Environment 1IM 9.1,  App Server REST API

Hello 

I  would like to extend the claims on the response schema thats returned on authentication call for REST API (AppServer/auth/apphost) by adding an extra claim with data from a CCC_ attribute in DialogUser table, any hint on how to achieve this?  Can this be done through configuration? 

Thks in advance for you attention...