Infoview passing userid/password to Xcelsius for Webservice Connection

Within Xcelsius, is it possible to get the Infoview user id and password of the user who accesses the dashboard?

We need to customize our Xcelsius dashboards to display data based on the user who connects to the dashboard. Our current dashboards have the userid and password hardcoded in the Xcelsius connection. If we can get the Infoview userid and password we could us this to dynamically build our Webservice input values and our webservice can return only the data needed by the current user.

I have read that we can control the data returned if we use QaaWS. Unfortunately I don't see how we can use QaaWS in this instance. Although our enterprise does use QaaWS for some dashboards connecting to SAP BW, the datasource for the dashboards that I am working on is Quickbase and we will connect to it via a Tibco webservice.