class ImperativeUserManager {
    private(set) var currentUser: User? {
        didSet {
            if oldValue != currentUser {
                NotificationCenter.default.post(name: NSNotification.Name("userStateDidChange"), object: nil)
                // Observers that receive this notification might then check either currentUser or userIsLoggedIn for the latest state
            }
        }
    }

    var userIsLoggedIn: Bool {
        currentUser != nil
    }
}