# Managing Payment Methods

OnsideKit provides a built-in screen where users can view, add, and remove the **bank cards** saved to their Onside account.

## Present the manager

```swift
@MainActor static func presentPaymentMethodsManager(
    completion: (@MainActor (Result<Void, OnsidePaymentMethodsManagerError>) -> Void)? = nil
)
```

```swift
Onside.presentPaymentMethodsManager { result in
    switch result {
    case .success:
        // The manager was presented and dismissed normally.
        break
    case .failure(.loginDiscarded):
        // The user dismissed the login screen shown before the manager.
        break
    case .failure(.notSupportedInLocalTesting):
        // Not available in local-testing mode.
        break
    }
}
```

`completion` is optional (`= nil`), so you can also call `Onside.presentPaymentMethodsManager()` with no arguments.

## Behavior

* **Implicit login.** If the user is not authenticated, OnsideKit presents the login flow first. If the user dismisses it, the completion fails with `.loginDiscarded`. See [Authentication & User Account](/sdk/core-concepts/authentication.md).
* **Local testing.** When the SDK is initialized with a `.storekit` configuration, this screen is unavailable and the call fails with `.notSupportedInLocalTesting`. See [Local Testing](/sdk/advanced-and-tooling/local-testing.md).

## Errors

`OnsidePaymentMethodsManagerError`:

<table><thead><tr><th width="280">Case</th><th>Cause</th></tr></thead><tbody><tr><td><code>.loginDiscarded</code></td><td>The user dismissed the login flow shown before the manager.</td></tr><tr><td><code>.notSupportedInLocalTesting</code></td><td>The SDK is running in local-testing mode (a <code>.storekit</code> configuration was passed to <code>initialize</code>).</td></tr></tbody></table>

## Customizing presentation

The manager is presented in a window owned by the SDK. You can choose which `UIWindowScene` it uses and override its theme via [`OnsideDelegate`](/sdk/customization/delegate.md), using the `.paymentMethodsManager` screen case.

{% hint style="info" %}
Looking to configure **Apple Pay**? That's a separate setup — see [Apple Pay](/sdk/purchasing/apple-pay.md).
{% endhint %}


---

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