Where does livebook store app secrets?

[Sleepful]

After creating an app secret and sharing it with a session, it can be retrieved like this:

System.fetch_env!("LB_APP_SECRET")

This is great.
However, I could not find any information on livebook's storage of these secrets.

[josevalim]

Which storage do you mean?

[Sleepful]

Directory path in local machine at which the secrets are persisted and method of storage (I suppose cleartext).

[josevalim]

We have a storage system which uses ETS and it is stored there.