Be able to create a different page where only the specific role can be logged in

Hello, I have a problem and I think that with some changes it could be solved perfectly.
I have a page where users register but I don’t want the administrator to register in the same register as the users, a specific slug could be created for the indicated administrators or roles, but my idea is a little different and instead of a slug, you could create a page in the pages section with a name and permanent link to choice in which only that specific role (example the administrator) or specific user could be logged in, this login would be restricted to those users or roles, any other user There would be an error in the login with a message on that page and we would leave the normal login for the other users, in the normal login those roles or specific users could not be logged in.
In short, divide the users into the normal login and the roles or specific users indicated on the page created with that new login.
This would be a great improvement for the security of the user and the administrator and would put the plugin very far from the competition, this can be a very good functionality.
A greeting.