public function send(RequestInterface $request)
 {
     $request = $this->authenticationManager->authenticate($request, $this->client);
     $uri = (string) $request->getUri();
     if (strpos($uri, $this->client->getResourceUrl()) !== 0) {
         $uri = new Uri($this->client->getResourceUrl() . $uri);
     }
     $request = $request->withUri($uri);
     return $this->httpClient->send($request);
 }