Getting rid of user identification dialog box

Hi Guys,

I am using QAAWS from a Webi Report Block as my data source for a dashboard. When I preview the dashboard, I get the user identification window asking for the system name, user name & password.

Now, when i map the username & password connection cells to my Excel Spreadsheet, the dialog box disappears. However, I do not want to enter my log in credentials in the spreadsheet.

Is there a way to run my dashboard and not get the dialog box without having to map the credentials to the spreadsheet?