node.js - How to verify FCM registration token on server?

Question

I got my Firebase Cloud Messaging registration token for web push. And I sent this to my server to save in database for later push. But how can I verify this token is valid or fake?

I have tried this but I think this is for Auth tokens not for web push.

Someone else can send request of a random fake token to my server. I want to prevent this before save in db.

Edit: It's solved and I wrote a simple class to use FCM for web push quickly. https://github.com/emretekince/fcm-web-push

Answer 1

Waitting for answers