To get the email from Twitter you can try using the [rule] (https://manage.auth0.com/#/rules/create) titled Get email address from Twitter
. You’ll also need to fill in your twitter consumer and secret keys within the rule:
var consumerKey = 'UPDATE-WITH-YOUR-CONSUMER-KEY';
var consumerSecretKey = 'UPDATE-WITH-YOUR-CONSUMER-SECRET-KEY';
As your image shows, on your twitter app permissions, under Additional Permissions, the Request email addresses from users
checkbox also needs to be enabled.
You can also find more information on this stackoverflow post: