> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api-and-sdk-zh/sdk/domains-api/tossauth/tossauth.isintegrated.md).

# TossAuth.isIntegrated

> 函数式 API `getIsTossLoginIntegratedService`也可以用来使用相同功能。

### 功能说明

用于确认用户是否已关联 Toss 登录。可用于查找现有的 Toss 登录用户，并进行转换为游戏标识符的迁移等。

Toss App Android/iOS `5.237.0` 及以上版本可使用。在不支持的版本中调用时 `UNSUPPORTED_APP_VERSION` 会发生错误。

如果在未使用 Toss 登录的 Mini App 中调用 `"需要设置 oauth2ClientId。"` 会发生消息错误。

### 类型

```ts
TossAuth.isIntegrated(): Promise<boolean>;
```

**参数**

无

**响应**

如果已关联 `true`，否则 `false`会返回。

### 错误代码

错误代码是 catch 到的错误的 `error.code` 值。

| 代码                        | 说明                                                                                                                   |
| ------------------------- | -------------------------------------------------------------------------------------------------------------------- |
| `UNSUPPORTED_APP_VERSION` | 如果当前运行的 Toss App 版本不支持此功能，则调用后会立即发生。 `TossAuth.isIntegrated.isSupported()`请先通过它确认，发生时 `error.message`请向用户显示（更新提示文案）。 |

### 示例代码

```js
import { TossAuth } from "@apps-in-toss/web-framework";

const button = document.querySelector("#check-integration-button");

button.addEventListener("click", async () => {
  try {
    const result = await TossAuth.isIntegrated();

    if (result === true) {
      console.log("这是已关联 Toss 登录的用户。");
    } else {
      console.log("这是未关联 Toss 登录的用户。");
    }
  } catch (error) {
    console.error(error);
  }
});
```


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