KeychainStorageP2.swift

var wrappedValue: Value? {

        get  { value }

        nonmutating set {

            value = newValue

            do {

                let encoded = try JSONEncoder().encode(value)
                try Keychain().set(encoded, key: key)

            } catch let error {

                try? Keychain().remove(key)
            }
        }
    }

    var projectedValue: Binding<Value?> {
        Binding(get: { wrappedValue }, set: { wrappedValue = $0 })
    }