JWT Token support in datasource

I am planning to use the JSON API plugin(JSON API plugin for Grafana | Grafana Labs) to call our REST API. Our API works based on JWT token. Initially, we need to call Signin API to get the JWT Token and use that token to call the other API. This token needs to be renewed for every 30 mins.

As per following link, I updated plugin.json and added the routes. However, On restarting grafana, I am getting the error “Failed to start plugin. Plugin file’s signature has been modified versus manifest”. Is it not allowed to update “plugin.json”? If so, what is the alternative to add tokenAuth section?

https://www.bookstack.cn/read/grafana-v6.2/99ade7a5e84896a8.md