Firebase firestore in android studio

Question

I have created two different user login using firebase and have set a firestore database.
I want to know how can I link eqch user to it's appropriate data only.

Answer 1

//Structure may look like
if(loged.user == data.users) {
console.log(loged.userImg)
console.log(loged.userName)
console.log(loged.Address)
}

Answer 2

//here is official doc
https://firebase.google.com/docs/auth/android/google-signin

Answer 3

Shudarshan Rai 👑 We specify collections and documents in firestore cloud. Is there any way to specify there itself to identify each document for particular user id(email).

Answer 4

Shudarshan Rai 👑 can you explain more.