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Overview

Turnkey’s Flutter SDK allows you to customize the sub-organization creation process in your Flutter application. This is useful if you want to tailor the onboarding experience — such as automatically creating wallets, configuring authentication method-specific settings, setting default usernames, or naming passkeys. These customization options can be applied differently for each authentication method.

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Customization

You can customize sub-org creation through authConfig.createSubOrgParams inside your TurnkeyConfig. Each authentication method can have its own configuration. For example, you can assign a default username for users who sign up via email OTP and a separate wallet setup for passkey users.
lib/main.dart
import 'package:turnkey_sdk_flutter/turnkey_sdk_flutter.dart';

final turnkeyProvider = TurnkeyProvider(
  config: TurnkeyConfig(
    // ... your existing configuration
    authConfig: AuthConfig(
      createSubOrgParams: MethodCreateSubOrgParams(
        emailOtpAuth: CreateSubOrgParams(
          userName: 'An email user',
          customWallet: CustomWallet(
            walletName: 'Email Wallet',
            walletAccounts: [
              v1WalletAccountParams(
                curve: v1Curve.curve_secp256k1,
                pathFormat: v1PathFormat.path_format_bip32,
                path: "m/44'/60'/0'/0/0",
                addressFormat: v1AddressFormat.address_format_ethereum,
              ),
            ],
          ),
        ),
        passkeyAuth: CreateSubOrgParams(
          userName: 'A passkey user',
          customWallet: CustomWallet(
            walletName: 'Passkey Wallet',
            walletAccounts: [
              v1WalletAccountParams(
                curve: v1Curve.curve_ed25519,
                pathFormat: v1PathFormat.path_format_bip32,
                path: "m/44'/501'/0'/0'",
                addressFormat: v1AddressFormat.address_format_solana,
              ),
            ],
          ),
        ),
      ),
    ),
  ),
);
You may also define a single set of parameters to apply across all authentication methods:
lib/main.dart
final subOrgParams = CreateSubOrgParams(
  userName: 'User-${DateTime.now().millisecondsSinceEpoch}',
  customWallet: CustomWallet(
    walletName: 'Wallet-${DateTime.now().millisecondsSinceEpoch}',
    walletAccounts: [
      v1WalletAccountParams(
        curve: v1Curve.curve_secp256k1,
        pathFormat: v1PathFormat.path_format_bip32,
        path: "m/44'/60'/0'/0/0",
        addressFormat: v1AddressFormat.address_format_ethereum,
      ),
    ],
  ),
);

final turnkeyProvider = TurnkeyProvider(
  config: TurnkeyConfig(
    // ... your existing configuration
    authConfig: AuthConfig(
      createSubOrgParams: MethodCreateSubOrgParams(
        emailOtpAuth: subOrgParams,
        smsOtpAuth: subOrgParams,
        oAuth: subOrgParams,
        passkeyAuth: subOrgParams,
      ),
    ),
  ),
);
For a full list of parameters available, inspect the CreateSubOrgParams class in the Flutter SDK.

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Next steps

Now that you can customize sub-org creation in Flutter, check out the Using Embedded Wallets guide next to learn how to create and manage wallets within your app!