The previous topic has been closed without resolution, so I’m reopening it!
Twitter does allow apps to request email address. If they do, Auth0 should store the email address just as it does for other social logins like LinkedIn.
Currently, I’m trying to use a rule to save the email into Auth0 (like https://auth0.com/rules/get-twitter-email#! but with proper persistence in the email field), but Auth0 won’t allow updating the the primary email for a social account. This scuppers attempts at account linking on email.
All these problem would go away if Auth0 would add support for the email address in Twitter if available and granted by the user.