Dropbox Access Token Expiry

Question

What is the lifetime for an Access Token acquired through the Dropbox oAuth2 APIs?

The answer after the https://api.dropbox.com/1/oauth2/token was something like

Answer 1

It effectively never expires. But users can invalidate tokens by unlinking an app. (In the case of an App folder app, they can delete the app folder from their Dropbox. For all apps, they can unlink the app on dropbox.com.)