Add the following code to your app:

<BlockSwitcher>
<Block name="Java">

```java
ApiAuthProviders authProviders = ApiAuthProviders.builder()
    .functionAuthProvider(() -> "[AWS-LAMBDA-AUTH-TOKEN]")
    .build();
AWSApiPlugin plugin = AWSApiPlugin.builder()
    .apiAuthProviders(authProviders)
    .build();
Amplify.addPlugin(plugin);
```

</Block>
<Block name="Kotlin">

```kotlin
val authProviders = ApiAuthProviders.builder()
    .functionAuthProvider { "[AWS-LAMBDA-AUTH-TOKEN]" }
    .build()
val plugin = AWSApiPlugin.builder()
    .apiAuthProviders(authProviders)
    .build()
Amplify.addPlugin(plugin)
```

</Block>
</BlockSwitcher>