FromContext returns the Session in the given Context, if it is set.

NewContext returns a new Context including the given Session.

NewSession returns a new database session for the given configuration, including selecting the appropriate database driver.

ErrNotFound should be returned when any database query finds no results.

NoteStore implementations handle access to the backing store for notes.

Session implementations handle access to the backing store(s) for notes and users for a single session.

UserStore implementations handle access to the backing store for users.