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# URLSession.AuthChallengeDisposition

Constants passed by session or task delegates to the provided continuation block in response to an authentication challenge.

```
enum AuthChallengeDisposition
```

## Topics

### Constants

[`URLSession.AuthChallengeDisposition.useCredential`](/documentation/Foundation/URLSession/AuthChallengeDisposition/useCredential)

Use the specified credential, which may be `nil`.

[`URLSession.AuthChallengeDisposition.performDefaultHandling`](/documentation/Foundation/URLSession/AuthChallengeDisposition/performDefaultHandling)

Use the default handling for the challenge as though this delegate method were not implemented. The provided credential parameter is ignored.

[`URLSession.AuthChallengeDisposition.cancelAuthenticationChallenge`](/documentation/Foundation/URLSession/AuthChallengeDisposition/cancelAuthenticationChallenge)

Cancel the entire request. The provided credential parameter is ignored.

[`URLSession.AuthChallengeDisposition.rejectProtectionSpace`](/documentation/Foundation/URLSession/AuthChallengeDisposition/rejectProtectionSpace)

Reject this challenge, and call the authentication delegate method again with the next authentication protection space. The provided credential parameter is ignored.


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