Enforce account linking and restricted signup?

[jpasquers]

Is there a way to set up/configure the account linking extension so that it:

1. Bypasses the User prompt to do account linking and proceeds with the linking process
2. Fails the newer user creation if the account linking fails (I reckon this part could be tricky since the rule processes post user registration right?)

The reason for this need is that auth0 accounts map back many to one to our accounts via email. At the same time we don't require email verification by default for basic auth0 accounts. So if a user proceeds to social signup for an email that has an existing direct unverified account, we would use the notion of the dual authorization to guarantee that the user has proper access to both identities.