Using JWT for internal REST calls in Drupal 8.

gistfile1.txt

    // Construct Authorization header using jwt token.
    $container = \Drupal::getContainer();
    $jwt = $container->get('jwt.authentication.jwt');
    $auth = 'Bearer ' . $jwt->generateToken();
    $client = \Drupal::httpClient();
    $options = [
      'auth' => [],
      'headers' => ['Authorization' => $auth],
      'form_params' => []
    ];
    $response = $client->request('GET', 'http://localhost:8000/node/' . $nid . '/media?_format=json', $options);

Thank you!! You save me a lot of days! :)