i have users login/signup system and DB to store their info in place, now i am integrating log in from facebook in my site.
i came to know , that not all fb users have email addresses some have mobile numbers as email address and those arent passed via oauth system, so no email value is passed after user log in using facebook.,
so how am i supposed to add him in my existing system where everthing is based on userid and email. ?
if no email is found on fb acocunt , should i ask user to enter email address after they have granted permission on facebook page, . but what if some people dont have email addresses at all.?
whats the best way to achieve this ?
allow users to log in using facebook and still be a part of my existing users system ?
