What Firebase services and components have you used in your projects?

In Android projects using Firebase, the following services and components are often used:

• Firebase Authentication — for user authentication via email, social networks, or anonymously.
• Cloud Firestore or Realtime Database — for storing and synchronizing data in real-time.
• Firebase Cloud Messaging (FCM) — for sending push notifications.
• Firebase Storage — for storing and uploading files, such as images.
• Firebase Analytics — for collecting usage statistics.

Example of using Firebase Authentication for email login:

FirebaseAuth.getInstance().signInWithEmailAndPassword(email, password)
    .addOnCompleteListener { task ->
        if (task.isSuccessful) {
            // Successful login
        } else {
            // Error handling
        }
    }