@elit-internet Really?
https://dev.twitter.com/rest/reference/get/account/verify_credentials
- Requesting a user’s email address requires your application to be whitelisted by Twitter. To request access, please use this form.
... and a very long thread on the subject stretching back years but only recently resolved in April of this year.
https://twittercommunity.com/t/how-to-get-email-from-twitter-user-using-oauthtokens/558/186
Please credit me with some sense, I don't make this stuff up :)