code: protected function send(RequestInterface $request): ResponseInterface
      {
          $request = $request->withHeader("Authorization", sprintf("Bearer %s", $this->apiToken));
          $request = $request->withHeader("Content-Type", "application/json");
          $request = $request->withHeader("Accept", "application/json");
  
          try {
              $response = $this->client->send($request);
          } catch (GuzzleException $e) {
              if ($e->getCode() === 401) {
                  throw new ClientException("Authorization failed. Did you specify the right api token?", $request, null, $e);
              }
  
              throw new ClientException(sprintf("Failed to execute request (code %d): %s", $e->getCode(), $e->getMessage()), $request, null, $e);
          }
  
          return $response;
      }
docs: Execute a request, adding required JSON headers and authorization.
  
  @param RequestInterface $request
  
  @return ResponseInterface