private function CreateTokenRequest($clientId, $clientSecret, $scope)
 {
     $request = new RestRequest("POST", true);
     $params = array("Content-Type" => "application/x-www-form-urlencoded; charset=utf-8", "grant_type" => "client_credentials", "client_id" => $clientId, "client_secret" => $clientSecret, "scope" => $scope);
     $request->SetParameters($params);
     return $request;
 }
 private function GetResponse($resource, $method, $params, $acceptType)
 {
     $request = new RestRequest($method);
     $request->SetAcceptType($acceptType);
     $request->SetAuthorization($this->accessToken);
     $request->SetParameters($params);
     return $this->restClient->Excute($resource, $request);
 }