Users with no email in social network get "User is already registered with this e-mail address." error

[Dolise]

In my case we use VK for social registration and some users don't have email in their accounts. And when user with no email try to register he get "User is already registered with this e-mail address." error. It happens because:

utils.email_address_exists

def email_address_exists(email, exclude_user=None):
    from .account import app_settings as account_settings
    from .account.models import EmailAddress

    emailaddresses = EmailAddress.objects
    if exclude_user:
        emailaddresses = emailaddresses.exclude(user=exclude_user)
    ret = emailaddresses.filter(email__iexact=email).exists()
    if not ret:
        email_field = account_settings.USER_MODEL_EMAIL_FIELD
        if email_field:
            users = get_user_model().objects
            if exclude_user:
                users = users.exclude(pk=exclude_user.pk)
            ret = users.filter(**{email_field + "__iexact": email}).exists()
    return ret

and

serializer.SocialLoginSerializer in it's validate method

if allauth_settings.UNIQUE_EMAIL:
    # Do we have an account already with this email address?
    account_exists = get_user_model().objects.filter(
        email=login.user.email,
    ).exists()
    if account_exists:
        raise serializers.ValidationError(
            _('User is already registered with this e-mail address.'),
        )`

don't filter users by email__isnull=False