public function isApplicableToRequest(Mage_Api2_Model_Request $request)
    {
        // This auth adapter is for frontend use only
        if (Mage::app()->getStore()->isAdmin()) {
            return false;
        }

        // Ensure frontend sessions are initialized using the proper cookie name
        $this->getHelper()->getCoreSession();

        // We are only applicable if the customer is logged in already
        return $this->getHelper()->getCustomerSession()->isLoggedIn();
    }