Ever wondered how you can change the default users application?
You have to create your own user management page and block access to the default one, and this is exactly that!
This application manages your users and you can change it at will, you can use this and then set the site property "AllowWebAccess" of the Users App to false.
This uses the Users app as user provider so you don't have to migrate any data.What you do need to do is change the references in all of your existing apps to use this application instead of default users app, but don't change the user provider, that should still be the Users app.
Updated to match the users version on 11