> For the complete documentation index, see [llms.txt](https://chat-sdk.gitbook.io/android/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chat-sdk.gitbook.io/android/setup/authentication-screen.md).

# Authentication Screen

### Built in Login Screen

If you would like to use the Chat SDK default authentication screen you should add the following to your `AndroidManifest.xml`:

```
<activity android:name="sdk.chat.ui.activities.SplashScreenActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>
```

Or if you want to launch the activity manually, you can do it using:

```
ChatSDK.ui().startSplashScreenActivity(context);
```

This will show the splash screen activity. The app will try to authenticate. If it succeeds it will launch the `MainActivity`. If it fails, it will launch the `LoginActivity`.