[LOG IN] How to only log in with Google? (No sign-up)

Hi everyone,

I’m developing an invitation-only application where user registration is handled through the backoffice, so I only need login functionality in my authentication system.

My login page offers two methods: magic link and Google login.

How can I configure Google authentication to only allow login and not sign up? I want to prevent the workflow from creating a new account if the user doesn’t already exist in my system.

Thank you in advance for your help!