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# MusicTokenRequestError

An error that the token provider or music requests can throw
upon requesting any token necessary for accessing Apple Music API.

```
enum MusicTokenRequestError
```

## Topics

### Enumeration Cases

[`case developerTokenRequestFailed`](/documentation/MusicKit/MusicTokenRequestError/developerTokenRequestFailed)

An error that indicates a failure in the process of fetching
a developer token for the current app.

[`case permissionDenied`](/documentation/MusicKit/MusicTokenRequestError/permissionDenied)

An error that occurs when the user doesn’t consent for the
current app to access their Apple Music data.

[`case privacyAcknowledgementRequired`](/documentation/MusicKit/MusicTokenRequestError/privacyAcknowledgementRequired)

An error that occurs when the user needs to acknowledge the most recent
privacy policy.

[`case unknown`](/documentation/MusicKit/MusicTokenRequestError/unknown)

An error indicating the ocurrence of an unknown or unexpected error.

[`case userNotSignedIn`](/documentation/MusicKit/MusicTokenRequestError/userNotSignedIn)

An error that occurs when the user isn’t signed in with an
Apple Music account.

[`case userTokenRequestFailed`](/documentation/MusicKit/MusicTokenRequestError/userTokenRequestFailed)

An error that indicates a failure in the process of fetching
a user token.

[`case userTokenRevoked`](/documentation/MusicKit/MusicTokenRequestError/userTokenRevoked)

An error that occurs when the user revokes permission for the
current app to access their Apple Music data.

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`Escapable`](/documentation/Swift/Escapable)

[`Copyable`](/documentation/Swift/Copyable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`Error`](/documentation/Swift/Error)

[`LocalizedError`](/documentation/Foundation/LocalizedError)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

---

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