The Zenn article sheds light on the usage of JWT authentication with the Drupal REST & JSON API Authentication module. The author outlines the prerequisite of installing and enabling two modules, "drupal/rest_api_authentication" and "drupal/restui," and highlights the steps for configuring JWT-based API authentication. However, the author encountered limitations in selecting the JWT method, which appeared to necessitate a subscription to a paid plan. The article points out the existence of modules for both JWT authentication and OAuth2 within the Drupal ecosystem. While the investigation is ongoing and the accuracy of the information remains uncertain, the author provides a preliminary overview of the challenges faced when utilizing JWT authentication in Drupal.