$card = Braintree_CreditCard::remove($account_reference_id);

        $card = Braintree_CreditCard::delete($account_reference_id);

    public function storeCc(array $card_info, array $contact, $client_reference_id = null)
    {
        $this->loadApi();

        // Format card and customer data to be submitted to BrainTree
        $params = $this->getCardStorageParameters($card_info, $contact);

        $customer = null;
        // Retrieve an existing customer from BrainTree if set
        if (!is_null($client_reference_id)) {
            try {
                $customer = Braintree_Customer::find($client_reference_id);
            } catch (Braintree\Exception\NotFound $ex) {
                // Do nothing
            }
        }

        // No customer exists, create a new one
        if (is_null($customer)) {
            $result = Braintree_Customer::create($params['customer']);

            // Log customer creation
            $this->logActions(
                'Customer::Create',
                $result->success,
                $result,
                $params['customer']
            );

            // Customer creation failed
            if (!$result->success) {
                return false;
            }
            $customer = $result->customer;
        }

        // Create new credit card for the customer
        $params['card']['customerId'] = $customer->id;
        $card = Braintree_CreditCard::create($params['card']);

        // Log card creation
        $this->logActions(
            'CreditCard::Create',
            $card->success,
            $card,
            $params['card']
        );

        // Card creation failed
        if (!$card->success) {
            return false;
        }

        return [
            'client_reference_id' => $customer->id,
            'reference_id' => $card->creditCard->token
        ];
    }