Is there a way to Hide user/pass in url calling web.show_document in Weblogic reports 12c?

Hello.

Is there a way to hide/encrypt the username/password of the url that is generated when calling a report using Weblogic12c+Reports 12c web.show_document.?

This could be done using frmrwinteg.jar in Oracle Application Server10g+Reports 10g, but this is not possible with Reports 12c.

We already now thet we can circunvent the problem using user_mapping and putting a user that can only read table tables so there is no problem, but we need that every report prints the user that calls/execute the report, so this approach does not solve our problem.