How to make clearIndexedDbPersistence more secure across user sessions?

[GaurangTandon]

The docs state:

clearIndexedDbPersistence() is primarily intended to help write reliable tests that use Cloud Firestore. It uses an efficient mechanism for dropping existing data but does not attempt to securely overwrite or otherwise make cached data unrecoverable. For applications that are sensitive to the disclosure of cached data in between user sessions, we strongly recommend not enabling persistence at all.

Though, in case we do have any sensitive user data in the Indexed db, what is the best practice on clearing it when the user logs out? One way would be to manually delete the databases that Firestore used, but I did not find a way to accurately get all the database names that Firestore uses to store data.