By limiting "sign in with Google" permissions, you can control what apps users access, and what OAuth grants they give those apps. You shouldn't block sign in — users will find another way — but you can block additional OAuth grants. More in our blog post: oblique.security/blog/unconfi...
oblique.security
The wrong way to block "Sign in with Google" | Oblique
You can block your users from signing into apps with their Google account, and granting access to their inbox. But not knowing what they're using is worse.