Authenticate with Firebase using Password-Based Accounts on Android

You can use Firebase Authentication to let your users authenticate with Firebase using their email addresses and passwords, and to manage your app's password-based accounts.

Before you begin

1. If you haven't already, add Firebase to your Android project .

2. If you haven't yet connected your app to your Firebase project, do so from the Firebase console .
3. Enable Email/Password sign-in:
   1. In the Firebase console , open the Auth section.
   2. On the Sign in method tab, enable the Email/password sign-in method and click Save .

4. In your module (app-level) Gradle file (usually <project>/<app-module>/build.gradle.kts or <project>/<app-module>/build.gradle ), add the dependency for the Firebase Authentication library for Android. We recommend using the Firebase Android BoM to control library versioning.

    dependencies 
     
    { 
     
     // Import the BoM 
   for the Firebase platform 
     
    implementation 
    ( 
    platform 
    ( 
    "com.google.firebase:firebase-bom:34.2.0" 
    )) 
     
     // Add the dependency for the Firebase Authentication 
   library 
     
    // When using the BoM 
   , you don't specify versions in Firebase library dependencies 
     
     implementation 
    ( 
    "com.google.firebase:firebase-auth" 
    ) 
    } 
   

   By using the Firebase Android BoM , your app will always use compatible versions of Firebase Android libraries.

   (Alternative)   Add Firebase library dependencies  without  using the BoM

   If you choose not to use the Firebase BoM , you must specify each Firebase library version in its dependency line.

   Note that if you use multiple Firebase libraries in your app, we strongly recommend using the BoM to manage library versions, which ensures that all versions are compatible.

    dependencies 
     
    { 
     
     // Add the dependency for the Firebase Authentication 
   library 
     
    // When NOT using the BoM 
   , you must specify versions in Firebase library dependencies 
     
     implementation 
    ( 
    "com.google.firebase:firebase-auth:24.0.1" 
    ) 
    } 
   

Create a password-based account

To create a new user account with a password, complete the following steps in your app's sign-in activity:

1. In your sign-up activity's onCreate method, get the shared instance of the FirebaseAuth object:

   Kotlin

    private 
     
    lateinit 
     
    var 
     
    auth 
    : 
     
    FirebaseAuth 
    // ... 
    // Initialize Firebase Auth 
    auth 
     
    = 
     
    Firebase 
    . 
    auth 
    EmailPasswordActivity 
    
    
    . 
    kt