---
title: ASExtensionErrorDomain
framework: authenticationservices
role: symbol
role_heading: Global Variable
path: authenticationservices/asextensionerrordomain
---

# ASExtensionErrorDomain

The domain for a credential provider extension error.

## Declaration

```swift
let ASExtensionErrorDomain: String
```

## Mentioned in

Providing one-time passcodes to AutoFill

## See Also

### Recognizing errors

- [ASExtensionError](authenticationservices/asextensionerror.md)
- [ASExtensionError.Code](authenticationservices/asextensionerror/code.md)