code: private function getHeaders($path)
      {
          $headers = [
              'Content-Type: application/json',
              'Accept: application/x.plentymarkets.v1+json',
              'cache-control: no-cache',
              'user-agent: ' . $this->getUserAgent(),
          ];
  
          if ('login' !== $path) {
              $headers[] = 'Authorization: Bearer ' . $this->accessToken;
          }
  
          return $headers;
      }
docs: @param string $path
  
  @return array