Line

Sign in with LINE accounts using OAuth 2.0 with OpenID Connect. Popular in Japan, Taiwan, and Thailand.

1. Create OAuth App

1. Go to the LINE Developers Console.
2. Log in with your LINE account.
3. Create a new Provider (or select an existing one).
4. Click Create a new channel > LINE Login.
5. Fill in the required fields:
   • Channel name: Your app name
   • Channel description: Brief description
   • App types: Check Web app
6. After creation, go to the LINE Login tab.
7. Add your callback URL (see below).

2. Set Redirect URI

Add your EdgeBase callback URL under the LINE Login tab > Callback URL:

https://your-edgebase-url/api/auth/oauth/line/callback

For local development:

http://localhost:8787/api/auth/oauth/line/callback

3. Get Credentials

In your channel's Basic settings tab:

• Client ID — Listed as Channel ID.
• Client Secret — Listed as Channel secret.

4. Configure EdgeBase

// edgebase.config.ts
export default defineConfig({
  auth: {
    allowedOAuthProviders: ['line'],
  },
});

export default defineConfig({
  auth: {
    oauth: {
      line: {
        clientId: 'YOUR_CHANNEL_ID',
        clientSecret: 'YOUR_CHANNEL_SECRET',
      },
    },
  },
});

5. Usage

JavaScript

client.auth.signInWithOAuth('line');

Dart/Flutter

await client.auth.signInWithOAuth('line');

Swift

let url = client.auth.signInWithOAuth(provider: "line")
// Open url in SFSafariViewController or ASWebAuthenticationSession

Kotlin

client.auth.signInWithOAuth("line")

Java

client.auth().signInWithOAuth("line");

C#

client.Auth.SignInWithOAuth("line");

C++

OAuth requires a browser redirect flow. For C++ (Unreal Engine), handle OAuth in a platform webview and pass the token to the SDK.

Provider Details

Property	Value
Scopes	profile openid email
PKCE	No
Email	Conditional — only from id_token, not profile API
Email verified	No — LINE does not provide verification status
Avatar	Yes — pictureUrl
Refresh token	Yes

Notes

• Email is extracted from the id_token JWT, not from the profile endpoint. The email may not be available if the user hasn't granted email permission.
• EdgeBase sets emailVerified: false for LINE accounts, so automatic account linking will not occur.
• The LINE user ID field is named userId (not id), which EdgeBase handles automatically.
• To request email access, you must apply for email permission in the LINE Developers Console under your channel's OpenID Connect settings.
• The channel must be Published (not in Development) for non-developer users to sign in.