SDK Reference
flutter
authenticate

authenticate Method

There are two ways to authenticate new users on your flutter app using Okto Flutter Sdk.

Authenticate user with idToken received from Google OAuth2.

Parameters

  • idToken - Token received from Google OAuth2.

If the user does not have a wallet, a wallet prompt will be shown to the user to create a wallet.

try {
  await okto.authenticate(idToken: 'idToken');
  print('success');
} catch (e) {
  print(e);
}

Example

import 'package:my_app/okto.dart';
import 'package:my_app/screens/home/home_page.dart';
import 'package:flutter/material.dart';
 
class LoginWithGoogle extends StatefulWidget {
const LoginWithGoogle({super.key});
 
@override
State<LoginWithGoogle> createState() => _LoginWithGoogleState();
}
 
class _LoginWithGoogleState extends State<LoginWithGoogle> {
final GoogleSignIn googleSignIn = GoogleSignIn(
  scopes: [
    'email',
    'https://www.googleapis.com/auth/userinfo.profile',
    'openid',
  ],
);
@override
Widget build(BuildContext context) {
   return Scaffold(
    backgroundColor: const Color(0xff5166EE),
    body: SafeArea(
      child: Column(
        children: [
          Expanded(
            child: Container(
              alignment: Alignment.center,
              margin: const EdgeInsets.all(40),
              child: const Text(
                'Login with google',
                style: TextStyle(color: Colors.white, fontWeight: FontWeight.w800, fontSize: 30),
              ),
            ),
          ),
          ElevatedButton(
              onPressed: () async {
                try {
                  final GoogleSignInAccount? googleUser = await googleSignIn.signIn();
                  final GoogleSignInAuthentication? googleAuth = await googleUser?.authentication;
                  if (googleAuth != null) {
                    final String? idToken = googleAuth.idToken;
                    await okto!.authenticate(idToken: idToken!);
                    Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) => const HomePage()));
                  }
                } catch (e) {
                  print(e.toString());
                  setState(() {
                    error = e.toString();
                  });
                }
              },
              child: const Text('Login with Google')),
          Text(error),
          const SizedBox(height: 20)
        ],
      ),
    ),
  );
  }
}

View in code (opens in a new tab)

setupgetUserDetails