SharedDefaults Property Wrapper

SharedDefaults.swift

@propertyWrapper
struct SharedDefault<T> {
    let key: String
    let defaultValue: T
    
    var wrappedValue: T {
        get {
            UserDefaults.securityCard.object(forKey: key) as? T ?? defaultValue
        }
        set {
            UserDefaults.securityCard.set(newValue, forKey: key)
        }
    }
}

//somewhere
extension UserDefaults {
    static let securityCard = UserDefaults(suiteName: "...")
}