SMP3.0 GW get data based on the user logged in?

Hi Experts,

I setup application with SMP3.0 backend SSO profile as Basic& Security profile as HTTP.

I tried 2 sessions with 2 different users using rest client and updated order details in the SAP system.

But both changes are successful but shows the 1 user id as changed by.

SMP shows 2 sessions with  2 users.

Is it because of RFC destination user credentials on GW? gwdemo_bgrfc_dest? I tested with gwdemo_bgrfc_dest destination logon credentials as Current User. Still the same issue.

How do we program in GW to know who the user logged in?

Thanks

seenu