# UserLinkerCallback

This interface is used with [`UserLinkerAsync`](/important-topics/sdk/api-reference/android/userlinkerasync.md).

## UserLinkerCallback API

### `onSuccess()`

> ```java
> void onSuccess()
> ```
>
> Call this method after linking succeeds.

### `onFailure()`

> ```java
> void onFailure()
> ```
>
> Call this method after linking fails.


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