OAUTH: using more than a RDN attribute in IDS profile to search users

Hello

i've configured aouth2.0 in oam to get access token for a mobile app.

Everything works fine if i use uid as a user research attribute. I've configured an IDS with RDN attribute set as uid. The directory store is an OUD.

We want to use even another attribute(nickname) to search users. So when the app calls the service oauth to get token with a username it should search both for uid and nickname attribute in the OUD.

We are testing the solution by curl in this way:

curl -i -H "Authorization: Basic YfefreferfeGllbnQ6M1dGTHVkVEZ5Qms=" -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" -d 'grant_type=password&username=test&passw