     public init?(from dict : JSONDictionary) {
         guard let c = dict["created_at"] as? String,
             let createdAt = dateFormatter.date(from: c),
-            let guid = dict["guid"] as? String,
             let id = dict["id"] as? String,
             let locale = dict["locale"] as? String,
             let timezone = dict["timezone"] as? String,

            else { return nil }

        self.createdAt = createdAt
        self.guid = guid
        self.id = id
        self.locale = locale
        self.timezone = timezone


extension User : Serializable {
    static let deleted = User(createdAt: Date(),
                              id: "",
                              locale: "",
                              timezone: "",
