Add social media register options to Register page

[hikalkan]

Currently, only the login page has the social media (external) login options. However, sometimes we are directly sharing a link of the Register page to users (to register to the website), so they may miss the social login option. So, both of login and register pages should have social/external login possibility.

[dmeagor]

Also once you've registered it's impossible to then login using SSO as you get an account already exists error.

Standard SSO flow is to match the SSO email address claim with an account on the system and log them in to that account. Is how it will work in 5.3-preview?

Another fairly critical option is to enforce SSO (disable basic login) once linked so that google/facebook/twitter 2FA cannot be bypassed using the login/password.

[lukebooroo]

I've just been looking at implementing the social logins for our app. I've run into the problem described above, plus these:

1. If there are existing users with the email address of their google account, there's no way to switch their login method to an external provider.
2. Email address is asked for in the registration process, shouldn't this be taken from the provider e.g. google

[dmeagor]

This is how chargebee handle login when the email matches multiple accounts. (in their case they have a "test site" also)

Google SSO login...

[hikalkan]

@dmeagor and @lukebooroo thanks for your feature suggestions. However, they are out of scope for this issue. We will consider these separately.