function _Token(iApiCommand $command)
    {
        $headers = [];
        $args    = iterator_to_array($command);

        if (
            array_key_exists('client_id',     $args)
            && array_key_exists('client_secret', $args)
        ) {
            // Request With Client Credential
            // As Authorization Header
            $headers['Authorization'] = 'Basic '.base64_encode($args['client_id'].':'.$args['client_secret']);

            unset($args['client_id']);
            unset($args['client_secret']);
        }

        $url = $this->_getServerUrlEndpoints($command);
        $response = $this->_sendViaCurl('POST', $url, $args, $headers);
        return $response;
    }