Where can i find "App Storage API endpoints" and any sample code in java using it

I wanted to use monday code for app development and using java springboot framework.
On page Deployment process it is mentioned that

If you’re not using NodeJS, here are some tips:

  • Secure storage (used for storing private information) is not supported.
  • Use our App Storage API endpoints to store application data.
  • monday code will capture all messages logged to stdout. Generate logs with the library of your choice.

My Question is, where can i find this “App Storage API endpoint” Do we have any sample code using it?