Is it possible to use wget to log into elog and export all of a logbook's data into a CSV file?

I can accomplish this perfectly when authentication IS NOT required by using:  wget --no-check-certificate -O e:\export.csv http://localhost:8080/demo/?mode=CSV1

However, I cannot accomplish it when authentication IS required by using:  wget --no-check-certificate -O e:\export.csv "http://localhost:8080/demo/?mode=CSV1&uname=agrant&upassword=skipper"

The latter appears to show that I've logged in, but the export file only contains a bunch of HTML tags, not the actual data as in the former.

How should I construct the wget command?