Hi @kkrp1!
Yes, your understanding of this is correct! This is discussed in more detail here (maybe this is the post you were thinking of 
): How to Send Email Invitations for Application Signup for Social accounts such as gmail email? - #3 by lihua.zhang
Social users can sign up for your app whether they receive an invitation or not.
Social users are “created” in Auth0 by logging in. So you can send the users a link that will redirect them to the login page. Then, they will log in with their social credentials, be redirected back to the app, and have an account.
Allowing or rejecting that process is up to you! Here are some examples that you might find useful:
- Access Control Action Sample
- Built-in Integrations in the Auth0 Dashboard under Actions > Library > Create Action > Use A Marketplace Integration. Search for the names “Country-based Access” and “Domain Based Registration.”
Please let me know if you have any additional questions!
Best,
Mary Beth