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# Enable support for Account Defender

In order to enable Account Defender, a user ID must be set. You can set it by calling the `PerimeterX/setUserId(userId:forAppId:)` function with a **non** `null` value. When the current user logout, you should call this function again with `null`. This will turn off the Account Defender.

```kotlin
try {
    PerimeterX.setUserId("<the current user ID>", null)
}
catch {
    println("error: ${exception.message}")
}
```

```java
try {
    PerimeterX.INSTANCE.setUserId("<the current user ID>", null);
}
catch {
    Log.e("tag","error: " + exception.getMessage());
}
```

In order to tell Account Defender about the user's flow, you should call the `PerimeterX/registerOutgoingUrlRequest(url:forAppId:)` function for each URL request that been send to your server. Notice that when the `PXPolicy/urlRequestInterceptionType` is set to any value rather than `PXPolicyUrlRequestInterceptionType/none`, the SDK registers URL requests automatically and you don't need to call this function.

```kotlin
try {
    PerimeterX.registerOutgoingUrlRequest("<URL>", null)
}
catch {
    println("error: ${exception.message}")
}
```

```java
try {
    PerimeterX.INSTANCE.registerOutgoingUrlRequest("<URL>", null);
}
catch {
    Log.e("tag","error: " + exception.getMessage());
}
```

You may add additional data using the `PerimeterX/setAdditionalData(parameters:forAppId:)` function.

```kotlin
try {
    PerimeterX.setAdditionalData(hashMapOf("key1" to "key2", "key2" to "value2"), null)
}
catch {
    println("error: ${exception.message}")
}
```

```java
try {
    HashMap<String, String> additionalData = new HashMap<>();
    additionalData.put("key1", "value1");
    additionalData.put("key2", "value2");
    PerimeterX.INSTANCE.setAdditionalData(additionalData, null);
}
catch {
    Log.e("tag","error: " + exception.getMessage());
}
```