Firebase - How to write/read data per user after authentication

Question

I have tried to understand but not able to see how and where might be the data I am storing after login is going.

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Answer 1

First, modify the Firebase rules as follows:

{
  "rules": {
    "users": {
      "$uid": {
        ".write": "$uid === auth.uid",
        ".read": "$uid === auth.uid"
      }
    }
  }
}

Then, in Java Code:

Firebase rootRef = new Firebase("https://user-account.firebaseio.com/");
// Assuming the user is already logged in.
Firebase userRef = rootRef.child("users/" + rootRef.getAuth().getUid());
userRef.child("message1").setValue("Hello World");

In the end, the data would look something like this:

Answer 2

For web end

Javascript code:

var user = firebase.auth().currentUser;

if (user != null) {
   uid = user.uid;
   firebase.database().ref('/users/'+uid).push({
      foo: 'abc',
      bar: 'pqr'
   });
}

Read https://firebase.google.com/docs/auth/web/manage-users#get_the_currently_signed-in_user for more information.