How do I securely identify logged in customer in the online store in the backend

Extensions
1

Is it possible to identify the logged in user using app proxy call?

Context:

  • I have created theme app extension

  • Customer is logged-in in the online store

  • I make app proxy call from my theme app extension to my app

  • QUESTION: How can I securely identify the logged in customer?

2

[Solved]

look for logged_in_customer_id field in the query params