Retrieve the console username of the user running a Swift program

ConsoleUser.swift

import SystemConfiguration

/**
Retrieve the console username of the user running the program.
Will be the same result as a `whoami` command.
*/
public func systemConsoleUsername() -> String? {
    var uid: uid_t = 0
    var gid: gid_t = 0

    return SCDynamicStoreCopyConsoleUser(nil, &uid, &gid) as String?
}