Authentication plugin using SQLite engine.
Determine if a given username/password pair is valid.
Boolean value, depending on whether or not it is matched in the SQLite database. This database is located at (home)/spool/auth.db.
Add a username/password pair to the authentication system.
Boolean, depending on success.
Remove user from SQLite database
Boolean, depending on success
Initialize the database, if this has not been done so already.