Note (and I've seen this in a lot of apps/sites) that you should expect to not receive an email from a Facebook login. I explicitly do not share my Facebook ema

Note (and I've seen this in a lot of apps/sites) that you should expect to not receive an email from a Facebook login. I explicitly do not share my Facebook email, and every website that wants to do Facebook login fails to notice that and ends up in an undefined state. Your site `/dieu/rest-auth/facebook/` endpoint crashes (because I assume it expects an email and doesn't get one)