BROKEN AUTHENTICATION - Bruteforcing Usernames

At the end of this section there are 4 questions.

I have completed the first two.

The third:“Find the valid account name for the web application based at subdirectory /question3/.”

I have used the script to see a clear difference in time from the “top-usernames-shortlist.txt” items.

Am I missing something , or seeing something that isn’t there with a possible user.

Please, can anyone help me out?