---
title: prepareInterfaceForExtensionConfiguration()
framework: authenticationservices
role: symbol
role_heading: Instance Method
path: authenticationservices/ascredentialproviderviewcontroller/prepareinterfaceforextensionconfiguration()
---

# prepareInterfaceForExtensionConfiguration()

Prepares the interface to enable the user to configure the extension.

## Declaration

```swift
func prepareInterfaceForExtensionConfiguration()
```

## Discussion

Discussion The system calls this method after the user enables your extension in Settings. Use this method to prepare a user interface for configuring the extension. You can also use the method to tell the system what credential identities your extension supports by adding them to the shared ASCredentialIdentityStore instance. Any identities you add become available as AutoFill suggestions. After finishing configuration, tell the system to dismiss your view controller by calling the context’s completeExtensionConfigurationRequest() method. note: To receive a call to this method, specify the ShowsConfigurationUI key with a value of YES in the ASCredentialProviderExtensionCapabilities dictionary, within the NSExtensionAttributes dictionary in the extension’s Information Property List.

## See Also

### Configuring the credential provider extension

- [ASCredentialIdentityStore](authenticationservices/ascredentialidentitystore.md)