How to change password using Firebase in Flutter

Question

I want to change current user password using Firebase in Flutter. Can any one help me on how to implement change password method?

Answer 1

As @Gunter mentioned that the feature is currently still unavailable, you can make use of the firebase REST API way of changing the password for the time being.

import 'package:http/http.dart' as http;
import 'dart:convert';
import 'dart:async';

Future<Null> changePassword(String newPassword) async {
  const String API_KEY = 'YOUR_API_KEY';
  final String changePasswordUrl =
      'https://www.googleapis.com/identitytoolkit/v3/relyingparty/setAccountInfo?key=$API_KEY';

      final String idToken = await user.getIdToken(); // where user is FirebaseUser user

    final Map<String, dynamic> payload = {
      'email': idToken,
      'password': newPassword,
      'returnSecureToken': true
    };

  await http.post(changePasswordUrl, 
    body: json.encode(payload), 
    headers: {'Content-Type': 'application/json'},  
  )
}

You can get the idToken by using the getIdToken() method on the FirebaseUser object

You can get the firebase api key under the project setting in your console

Answer 2

I know this is a late post, but now it's possible to change the password of the logged-in user. Make sure to notify the user to log in again since this is a sensitive operation.

void _changePassword(String password) async{
   //Create an instance of the current user. 
    FirebaseUser user = await FirebaseAuth.instance.currentUser();
   
    //Pass in the password to updatePassword.
    user.updatePassword(password).then((_){
      print("Successfully changed password");
    }).catchError((error){
      print("Password can't be changed" + error.toString());
      //This might happen, when the wrong password is in, the user isn't found, or if the user hasn't logged in recently.
    });
  }

Answer 3

This should work according to the latest version of firebase:
final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
User currentUser = firebaseAuth.currentUser;
currentUser.updatePassword("newpassword").then((){}).catchError((err){})

Answer 4

This is currently not supported.

When this pull request is merged https://github.com/flutter/plugins/pull/678 the Flutter firebase_auth package will support that.