protected function getParams()
    {
        $params = ["key=".$this->apiKey];
        if (@count($this->options[0]) > 0 && is_array($this->options[0])) {
            foreach ($this->options[0] as $k => $v) {
                if ($k != "response_type" && $k != "apiKey") {
                    array_push($params, "$k=$v");
                }
            }
        }
        return $params;
    }