Web App - Google/Facebook auth - can authenticate, but cannot retrieve email

[Luca]

Context: web app,  Firebase 3.2

I can authenticate the user via Google or Facebook (using the popup flow) without any issue, but I am going nuts about retrieving the email of the user... :-)

I checked both Google and Facebook and both apps require the email access as per the addScope... during the auth consent it also clearly specifies that email will be accessed.

Yet, the "user" authenticated displays the correct profile name, the photoURL, but an empty email... so I end up having a user in Firebase, but with no email attached...

Anyone has an idea of what might the reason for this?

thanks in advance!

[Luca]

OK, found the issue... kinda of RTFM solution, but it wasn't that obvious in my view :-)

https://support.google.com/firebase/answer/6400716

in the Authentication->Sign-in method -> Advanced section you have to set the "Prevent creation of multiple accounts with the same email address" option...

only then you will be able to retrieve the email...

hope it helps