Token Revocation & Introspection

Imagine you've logged into an app, and it gives you a digital key (an access token) to open certain doors (access resources). What if you want to change the lock, or lose the key?

This lesson explores how to manage these digital keys: revoking them to stop access, and introspecting them to check if they're still valid.

Token revocation is the process of explicitly invalidating an access or refresh token before its natural expiration time.

• Why revoke? User logs out, password reset, account compromise, or the client application is no longer trusted.
• It immediately cuts off access, enhancing security.