- The webpage is at: http://challenges.magpiectf.ca:13000/
- Convert this from base64 and you get:
We need someone to fix /login, it's been broken for far too long.
- Remember that the key is
consistency 
- In base64, this is:
vignere - Note that when you access this webpage, you get a cookie and value
- In cyberchef, we get:
- Then, lets just change guest to admin, and we get:
