public function subscribe(array $values)
    {
        $result = $this->buildAndSend('subscribe', $values);

        /**
         * Prepare the array to return
         */
        $notice = [
            'status' => true,
            'message' => '',
        ];

        /**
         * Handle results
         */
        switch (strval($result)) {
            case '1':
                $notice['message'] = 'Subscribed.';

                break;
            case 'Already subscribed.':
                $notice['message'] = $result;

                break;
            default:
                $notice = [
                    'status' => false,
                    'message' => $result
                ];

                break;
        }

        return $notice;
    }