public function get($key){
        $url = $this->authenticationService->getServerEndPoint() . Endpoints::VERSION . Endpoints::BASE_META . Endpoints::META;

        $result = $this->authenticationService->getTransport()->fetch($url,array("key"=>$key));

        if($result["code"] == APIResponse::RESPONSE_SUCCESS){
            $unwrapped = @json_decode($result['results']['value']);
            $value = $unwrapped === null ? $result['results']['value'] : $unwrapped;
            return array("value" => $value, "validity" => $result['results']['validity']);
        }else{
            return null;
        }
    }