If you want to use a single code, that has an unlimited number of uses and works for all users, you should use a Permanent Access Code:
- Open the Course Guides page
- Click the "Access Codes"-button
- Click the "Reveal"-button
- Distribute this code the way you see fit
REMEMBER - The Permanent Access Code can be shared with anyone and will work, effectively meaning that the course guide is free for all if someone gets the code.