Change polling period to 5 seconds instead of an hour and a half

[xFrenchy]

Summary

When testing this new example, the user will not actually see anything happen or be revoked for a long time.

Details and comments

Changed the polling period to 5 seconds so that a revoke can be seen relatively quickly. Could be faster than 5 seconds

Checks

• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.