I would like to manage the "known" accouts separatly.

I mean:

1. When I choose to start a client, if the account isn't known by the authentication cache, I would like it to throw an error.
2. I would like an API to manually add accounts to the cache and retrieve the list of the accounts that are stored in the cache.

It may already be possible with the API but I didn't find how to do it... Also the second point is already possible, there is no real need for my first point.

Thank you in advance :)