How to disable sign up via social login?

I’m not sure. I’m curious if you can think of any of the documents you went through while researching this that would be a good place to clarify it.

My use case is simple: I have an e-mail address corresponding to a name/password account in auth0, and if somebody comes in via social login only that e-mail address may go through. Is there a snippet for Rules that you can share that allows just that? It’s a very simple use case that many users will benefit from.

Where would you have this list of users that can login with a social identity? In an external database?