Mail return null when trying to access user data 'Android', why?


I need to read user mail


If you need to access a Twitter user’s email address, you’ll need to apply for whitelisting as described in the documentation.

If you’ve done that, and don’t get back an email address, it could be because the user explicitly denies access to your app (in which case the failure method should be triggered), or that they have never verified the email address associated with their account or they signed up with a phone number. This is also explained in the docs (see the Note box towards the bottom of the page).