There seems to be lots of posts where another app / website uses a WP website to authenticate against. I am looking for the opposite.
I have a Rails app that uses Devise for authentication. I have a WP site hosted on a separate server. This will be a support site for the Rails app. I want the support site to be closed unless you have authenticated on the rails site.
I don't think I would have a problem creating an API on the Rails app I just don't have enough experience with WP to integrate the two together like this.
In the end what I want is if you are authenticated on the Rails app you can access the WP site and are automatically logged in / authenticated etc. otherwise you get redirect to the Rails app login page.
I am looking for help (plugin, suggestions, tutorial etc.) on how to configure WP to allow this or else confirm that this is not really practical to accomplish.