Facebook Login Doc Wrong

[WangHansen]

snippets-web/snippets/auth-next/facebook/auth_facebook_signin_redirect_result.js

Line 23 in 509769a

const email = error.email;

I followed guide on Login with Facebook, but kept getting auth/missing-identifier error, the error is not well documented. It happens when the email passed into fetchSignInMethodsForEmail is empty. And it turns out the reason for that is the way to fetch email from document is wrong.

Email should be fetched as:

const email = error.customData.email

Please update the docs so that no other developers are confused

[thatfiredev]

@WangHansen Thanks for opening this issue!

I can confirm the v9 docs should use customData, as seen in the reference docs. (leaving the v8 reference docs here for comparison)

I've opened a PR to address this: #289