Fetches the unified contact that is the "me" card.
- macOS 10.11+
The properties to fetch in the returned
Error information, if an error occurred.
The unified contact that is the "me" card or
nil if no "me" card is set.
In the user interface, the "me" contact is represented by "My Card." It is recommended that you fetch only the properties you expect to use. You can combine contact keys and contact key descriptors together.