WeChat

To use WeChat sign in, you need to register a website application on the [WeChat Open Platform](https://open.weixin.qq.com/), set the `Authorization Callback Domain` to the better auth domain and get your App ID and App Secret.

To configure the provider, you need to import the provider and pass it to the `socialProviders` option of the auth instance.

```ts title="auth.ts"
import { betterAuth } from "better-auth"

export const auth = betterAuth({
    socialProviders: {
        wechat: { // [!code highlight]
            clientId: process.env.WECHAT_CLIENT_ID, // [!code highlight]
            clientSecret: process.env.WECHAT_CLIENT_SECRET, // [!code highlight]
        }, // [!code highlight]
    },
})
```

#### Optional Configuration

You can customize the WeChat provider with additional options:

```ts title="auth.ts"
export const auth = betterAuth({
    socialProviders: {
        wechat: {
            clientId: process.env.WECHAT_CLIENT_ID,
            clientSecret: process.env.WECHAT_CLIENT_SECRET,
            // Optional: Set UI language for the WeChat login page
            lang: "cn", // or "en" for English
            // Optional: Use custom scopes
            scope: [], // "snsapi_login" for web QR code login.
        },
    },
})
```

To sign in with WeChat, you can use the `signIn.social` function provided by the client. The `signIn` function takes an object with the following properties:

* `provider`: The provider to use. It should be set to `wechat`.

```ts title="auth-client.ts"
import { createAuthClient } from "better-auth/client"
const authClient = createAuthClient()

const signIn = async () => {
    const data = await authClient.signIn.social({
        provider: "wechat"
    })
}
```