How to connect and identity user from

This answer my initial question about how to create endpoints for my mobile app.
https://www.wix.com/corvid/forum/main/comment/5e97057dc14d3b0017fd0f57

I have a supplimentrary question about user autorisation. When you create a http_function which I connect from a custom app, how would I connect and identity the user. Is there a system for jwt tokens for example ?

Thanks