Authentication

Hi

I’m new to WP. I have 2 separate applications. One I’m building a JavaScript/NodeJS application using mean.io stack. The other one is in cakephp. As part of that I will have a users using that application. The rest of the site is in wordpress. so user management, homepage, authentication is all in wordpress.

The question is how do I integrate both the application into wordpress. So when someone has to access the cakephp app or nodejs app I want to check against wordpress to ensure they are authenticated if not just forward them to wordpress for authentication and then back to the application.