trace wget http header into apache log

Question

Hi,
For our module we've web server with XAMPP on Linux box.
For end-user to download file, user can use WGET utility.

ex.- wget http://username:[email protected]/<file-path>

Now I want to capture username in apache log.
I've tried with various option in apache log but I couldn't capture username into log file.

like.- %u, %r, %{Referer}i

So can you please suggest me the method that how to capture username into apache log file ?
Thanks in advance.