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# ASCredentialIdentity

A protocol that credential identity classes conform to that uniquely identifies credentials.

```
protocol ASCredentialIdentity : NSObjectProtocol
```

## Topics

### Ordering credential identities

[`rank`](/documentation/AuthenticationServices/ASCredentialIdentity/rank)

An indicator that enables you to prioritize credential identities relative to each other.

### Associating a user

[`user`](/documentation/AuthenticationServices/ASCredentialIdentity/user)

The username associated with this credential.

### Distinguishing identities

[`recordIdentifier`](/documentation/AuthenticationServices/ASCredentialIdentity/recordIdentifier)

A string used to correlate this identity to a record in your app’s own database.

[`serviceIdentifier`](/documentation/AuthenticationServices/ASCredentialIdentity/serviceIdentifier)

An identifier that helps the system know with which apps or websites to associate this credential.


---

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