Hello i need help to implements a feature on my application.

I want to enable user to login whit Itch.io, and check if the user have purchased the asset.

i see

https://itch.io/api/1/KEY/game/GAME_ID/purchases

Actually i dont have an download for my project.

But first to release it, need check if user have purchased the asset.

A simple way to setup this api?  maybe an example file?

witouth library or other tool. Just in simple javascript or HTTP request

PS: Is a tool, i think is impossibile run it on Itch app.

Good question does Itch have an SDK for devs? I'm a Unity dev so having a .net SDK would be great or a simple API would work. Only issue I would see is users would need to log in to the local game using their Itch IO account. Which means the games would need to use encrypted data stream to Itch to prevent data breach. Unity for example allows you to easly communicate with API's. However, they don't require HTTPS. So I guess Itch would have to require users only send HTTPs requests?