PHP Site Integration

Interested in using this if I understand it correctly. I have a PHP site with 50K users. I want my wordpress/bbpress site to be closed to new registrations but instead require that forum posts be from existing users on the main site.

I’m looking for a login form on the wordpress site that routes the email/password to a PHP page on the main site where it would verify the user and return a go/no-go authentication. All wordpress users would be limited to the forums (participant role) and not be able to post to blog. The main site can create the needed JSON response format after user lookup.

Questions: is that the scope of this plugin? would a user record need to be created on the WP side in order for their forum posts to have valid user references? does your plugin handle that? i assume that i don’t need to sync users since the lookup will always be against the main site. deleting a user there would result in denied access on the WP site.

Thanks,

https://www.ads-software.com/plugins/wp-restful-single-sign-on/