docs: def sync_user_email_addresses(user):
      """
      Keep user.email in sync with user.emailaddress_set.
  
      Under some circumstances the user.email may not have ended up as
      an EmailAddress record, e.g. in the case of manually created admin
      users.
      """
      from .models import EmailAddress
      email = user_email(user)
      if email and not EmailAddress.objects.filter(user=user,
                                                   email__iexact=email).exists():
          if app_settings.UNIQUE_EMAIL \
                  and EmailAddress.objects.filter(email__iexact=email).exists():
              # Bail out
              return
          EmailAddress.objects.create(user=user,
                                      email=email,
                                      primary=False,
                                      verified=False)