CI 3 HMVC Modular Extensions can't load Session Library

How do you do this In CI3 either the documentation isn't updated or I'm looking in the wrong place. As i would like to use database for sessions

http://www.codeigniter.com/userguide3/li...references

Same place as always, in /application/config/config.php:

PHP Code:

$config['sess_driver'] = 'database';