Connecting User Data to Auth
Link authenticated user IDs to their corresponding data entries in the Realtime Database for personalized content.
Link Auth & Database
Why connect user authentication with your database? It's crucial for building personalized and secure applications.
By linking, you can:
- Store user-specific data like profiles or settings.
- Control access to data based on who is logged in.
- Create personalized experiences for each user.
Accessing the User's UID
Every authenticated user in Firebase has a unique User ID (UID). This ID is your key to linking their authentication status to their data.
You can get the current user's UID from the currentUser object after a user signs in.
<!-- Assume Firebase SDKs are loaded -->
<!-- and firebase.initializeApp() has been called -->
<script>
// Listen for authentication state changes
firebase.auth().onAuthStateChanged(user => {
if (user) {
const uid = user.uid;
console.log("Current User UID:", uid);
// Example: Display UID in a web element
// document.getElementById('user-uid').innerText = uid;
} else {
console.log("No user signed in.");
}
});
</script>All lessons in this course
- Connecting User Data to Auth
- Realtime User Profiles
- Collaborative Data Editing
- Role-Based Access for User Data