This wordpress plugin will make a bridge between your Wordpress users (wp is the "master") and the Pydio users. That means that users created/deleted in your wordpress installation will be created/deleted in your Pydio installation, and that you will use the Wordpress login page instead of the "popup" to log on to Pydio.

So what do you need to make it work?
You should now be good to go, try to login using WP users credentials, from "both" sides: either via WP login form or via Pydio login form.

http://pyd.io