Hello!
So i followed several guides and made progress:
https://suehernandez.wordpress.com/2013/10/11/sharepoint-2013-infopath-claims-getuserprofilebyname/
https://spvee.wordpress.com/2013/04/10/auto-populate-user-information-in-infopath-with-claims-based-authentication-part-3-of-3/
I have gotten past the 401 Forbidden, with the disableloopback fix.
However, Now the web service is returning information of the service account i setup in Secure Store..
Any ideas?