---
title: callbackURLScheme
framework: authenticationservices
role: symbol
role_heading: Instance Property
path: authenticationservices/aswebauthenticationsessionrequest/callbackurlscheme
---

# callbackURLScheme

The scheme for the browser to use when returning the result of the authentication attempt to the app requesting it.

## Declaration

```swift
var callbackURLScheme: String? { get }
```

## Mentioned in

Supporting Single Sign-On in a Web Browser App