Does Sign In with Apple JS provide functionality to prevent creating a new account if one doesn't already exist for a given Apple ID?
For context, we have Sign In with Apple set up in our iOS app. Some subset of our users have access to a web app. We want to let users in this group log in to the web app if they used Sign In with Apple to create their account. This web app is for existing users only. We want to avoid a situation where someone stumbles across this web app and attempts to create an account.
However, I've been unable to find documentation or example code that meets this goal. Is it possible to achieve this? Thanks for reading.
