email field is optional in passportjs facebook strategy
问题 I wrote the code for login with facebook, everything works and I'm getting the user's email address. But there is another option on facebook which lets the user select the data my application is going to have access to. If user clicks on that, he'll see the name and everything marked as required, but email is optional and the user can remove it from the data that is going to be provided to the app. On the application, email is required. So how I can mark the email as required on facebook?