Hint:

1. Company Domain: PentesterAcademy.com
2. Usernames: nick, admin
3. HTTP Authentication Password Complexity: 5 characters and uses only a,s,d lowercase. Password examples - asddd, aassd, ssdaa etc.
4. Experiment with multiple ways to solve this - Hydra, Burp, Metasploit etc.
5. Try scripting your own tool using Python or other languages
6. Think about all you've learnt at Pentester Academy :)