def get_link_by_email(self, user_email):
        """
        Return link by email.
        """
        try:
            user = User.objects.get(email=user_email)
            try:
                return self.get(user_id=user.id)
            except EnterpriseCustomerUser.DoesNotExist:
                pass
        except User.DoesNotExist:
            pass

        try:
            return PendingEnterpriseCustomerUser.objects.get(user_email=user_email)
        except PendingEnterpriseCustomerUser.DoesNotExist:
            pass

        return None
def get_link_by_email(self, user_email):
        """
        Return link by email.
        """
        try:
            user = User.objects.get(email=user_email)
            try:
                return self.get(user_id=user.id)
            except EnterpriseCustomerUser.DoesNotExist:
                pass
        except User.DoesNotExist:
            pass

        try:
            return PendingEnterpriseCustomerUser.objects.get(user_email=user_email)
        except PendingEnterpriseCustomerUser.DoesNotExist:
            pass

        return None
Return link by email.