//escrevendo
let user = User(email: "ramires.nas@gmail.com", password: "academy2018")
if let userDefaults = UserDefaults(suiteName: "group.com.ramires") {
    do {
        let data = try JSONEncoder().encode(user)
        userDefaults.set(data, forKey: "user")
    }catch {
        print(error.localizedDescription)
    }
}

//Lendo
let userDefaults = UserDefaults( suiteName: "group.com.ramires")
if let dataUser = userDefaults?.object(forKey: "user") as? Data {
    do {
        let user = try JSONDecoder().decode(User.self, from: dataUser)
        print(user.email)
        print(user.password)
    }catch{
        print("error")
    }
}