check out the configuration, and register e.g. Store::Foo::Backend, and set it
as the default store.
+ __PACKAGE__->default_auth_store( $store );
+
+ # the same as
+
+ __PACKAGE__->register_auth_stores( default => $store );
+
=head1 WORKING WITH USERS
All credential verifiers should accept either a user object, or a user ID.