Hi,
We found there are some users who login FB with only cell phone number and without email address, and these user will be assigned the same account to my site.
Is there a way I could prompt user they must provide the email address in their FB to login my site?
Thanks in advance

Best regards

Hi,
that's normal and it can't be changed. It depends on the type of Facebook account and privacy settings of each FB user.
Not all FB users have public access to their email address, in such case it's auto generated to allow a Joomla login.

Best regards

Thanks John.
Is there a programming interface after user authenticated by FB but before the Joomla account was created, I could redirect the user to a page for some necessary data for my site?


Best regards

Yes, but you need to customize the code of the Facebook API connector.

Instead of generating automatically a random email address, you should change the code to perform a redirection.

The file is: root/modules/mod_instantfblogin/socials/facebook.php

and the line where the email address is managed is the number 62:
$email = $fbUserProfileArray ['email'] ? $fbUserProfileArray ['email'] : $fbUserProfileArray ['id'] . '@facebook.com';

Best regards