How to retrieve user's details using cognos SDK ?

[Galaxy]

Hi All,

Have installed and configured Cognos into a WAS (Application Server) using Servelet Gateway approach.  Basically this is to handled the SSO.   Further to this, i am trying to figure out the way to retrieve the current user's details using Cognos SDK and also the possibilities to pass the data from  external system to cognos. 

The user's details could be  user id, group etc.

if you have any solutions and suggestions , please let me know.

Thanks