Tells the delegate that authentication has begun for the specified operation and constraint.
- iOS 13.0+
- macOS 10.12+
- Mac Catalyst 13.0+
- tvOS 13.0+
The token session.
The kind of operation.
The constraint to be satisfied.
The resulting context of the operation, or
nil if an error occurred.
If you return an instance of a subclass of
TKToken that is provided by the CryptoTokenKit framework, the system will first fill in the context-specific properties, such as the password, before calling the
finish method on the context.