This video (episode 3 of 12) builds the login functionality for InstaFire. We build the UI so users can sign into the app with an email and password, and we integrate Firebase Authentication, which handles user identity. We use the Firebase console to create two test users for our app. InstaFire playlist:    • InstaFire: Android Instagram Clone wi...   Helpful links for more information: ➤ Firebase Authentication: https://firebase.google.com/docs/auth ➤ Intents on Android: https://developer.android.com/guide/components/intents-filters ➤ The Net Ninja tutorial: https://www.youtube.com/watch?v=aN1LnNq4z54 Note that Firebase Auth is purely for authentication data, so in order to store user attributes like profile pic or username, we'll use Firestore in a later video. In these videos, we build a basic Android Instagram app clone using Firebase, written in Kotlin. Our app allows the user to sign in and create posts with an image and description. We use Firebase, an app development platform developed by Google, to power our application. We use various Firebase services such as Authentication, Storage, and Firestore to build our app.