> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/secure-card-display/integrate-d1-sdk/get-started/configuration/4.-authentication/sdk-logout.md).

# SDK logout

### Overview

This section provides the logout step that revokes tokens pertaining to the D1 session associated with the specific `D1Task` and its corresponding `issuerId`. This API should be executed prior to logging out of the issuer application.

{% tabs %}
{% tab title="Android Java" %}
{% code title="" lineNumbers="true" %}

```java
public void logout(@NonNull D1Task d1Task) {
    D1Task.Callback<Void> callback = new D1Task.Callback<Void>() {
        @Override
        public void onSuccess(Void ignore) {
            // Proceed with subsequent flows
        }

        @Override
        public void onError(D1Exception exception) {
            // Refer to D1 SDK Integration – Error Management section
        }
    };
    d1Task.logout(callback);
}
```

{% endcode %}
{% endtab %}

{% tab title="Android Kotlin" %}
{% code lineNumbers="true" %}

```kotlin
fun logout(d1Task: D1Task) {
    val callback: D1Task.Callback<Void?> = object : D1Task.Callback<Void?> {

        override fun onSuccess(ignore: Void?) {
            // Proceed with subsequent flows
        }

        override fun onError(exception: D1Exception) {
            // Refer to D1 SDK Integration – Error Management section
        }
    }
    d1Task.logout(callback)
}
```

{% endcode %}
{% endtab %}

{% tab title="iOS" %}
{% code overflow="wrap" lineNumbers="true" %}

```swift
d1Task.logout() { error in
    if let error = error {
        // Refer to D1 SDK Integration – Error Management section
    } else {
        // Proceed with subsequent flows
    }
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

### SDK logout all

This section provides the logout step that revokes **all tokens for all `D1Task`**. This API should be executed prior to logging out of the issuer application.

{% tabs %}
{% tab title="Android Java" %}
{% code title="" overflow="wrap" lineNumbers="true" %}

```java
public void logoutAll(@NonNull D1Task d1Task) {
    D1Task.Callback<Void> callback = new D1Task.Callback<Void>() {
        @Override
        public void onSuccess(Void ignore) {
            // Proceed with subsequent flows
        }

        @Override
        public void onError(D1Exception exception) {
            // Refer to D1 SDK Integration – Error Management section
        }
    };
    d1Task.logoutAll(callback);
}
```

{% endcode %}
{% endtab %}

{% tab title="Android Kotlin " %}
{% code lineNumbers="true" %}

```kotlin
fun logoutAll(d1Task: D1Task) {
    val callback: D1Task.Callback<Void?> = object : D1Task.Callback<Void?> {

        override fun onSuccess(ignore: Void?) {
            // Proceed with subsequent flows
        }

        override fun onError(exception: D1Exception) {
            // Refer to D1 SDK Integration – Error Management section
        }
    }
    d1Task.logoutAll(callback)
}
```

{% endcode %}
{% endtab %}

{% tab title="iOS" %}
{% code overflow="wrap" lineNumbers="true" %}

```swift
d1Task.logoutAll() { error in
    if let error = error {
        // Refer to D1 SDK Integration – Error Management section
    } else {
        // Proceed with subsequent flows
    }
}
```

{% endcode %}
{% endtab %}
{% endtabs %}


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