Getting User Code

SOLVED

I am trying to change the user code on orders importing through ROI's Insynch based on the customer no.  To get the user code do you use "oSession" I wouldn't think so because the actual user is not actually in the session right?  And I shouldn't use "oBusObj" either because it is in another table, not the header correct?  I do not see any examples of going into the SY_User table from the header to pull the value.