YouTube API Terms of Service: Developer Policy III.E.4.b. states:
Note that even though an API Client may store this data for more than 30 days, the Client must still ensure every 30 days that it is still authorized by the user to access that data.
What does "ensure" mean?
Do we need to have a terrible UX that makes users re-authenticate every 30 days? Or do we just need to verify that the OAuth 2.0 credentials are valid?