Should we allow a user to register without an email?

[aaronamm]

According to this closed issue, I found the similar scenario.

There are many users who tried to register to my website with their Facebook accounts and their accounts do not have emails. In fact, Facebook allows users to log in with a phone number and their account do not need to have emails.

If we have a website that allow a user to register with external provider only for their convenience, I think making an email optional does make sense.
In the admin page, we add a setting to change if email is required or not.

For an external login, if an email is required and a user's external provider does not have an email, one will be redirected to a simple page to enter a missing email.

IMHO, there are some extension points/event handlers in registration area that we can make a simple module to support this feature.

[hishamco]

Are you willing to submit a PR for this feature?

[aaronamm]

@hishamco if you think it is valid, I am happy to create a module to OrchardCoreContrib.

[hishamco]

While it's valid for Facebook, let us move on to implement it