If I change my site to use EasySocial for the login can my existing Joomla users be imported in?

I am wanting to add EasySocial to a site that already has hundreds of users. I would then need to get all the users to fill out EasySocial profiles. Can I somehow import the users into incomplete profiles which they would then complete the next time they attempted to login?

What is the best way to do that. If you have a page about this already documents I would love the url.

Thank you, Sean Carney