There are two emails potentially associated with a brainCloud user account:

Note that when you first attach an email identity to a user, the system will also set that's contact email to the same email address (if it's blank). It doesn't overwrite the email if it already had a value.

This means, that if you are updating a users's email identity, you will probably also want to update their contact email directly as well (so use both calls in that case).

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