protected string UniqueJaneDoe()
    {
        var unique =
            UserData.From(
                $"{_uniqueId}",
                NameData.From("Jane", "Doe"),
                ContactData.From("*****@*****.**", "+1 212-555-1212"));

        ++_uniqueId;

        string serialized = JsonSerialization.Serialized(unique);

        return(serialized);
    }
    protected string UniqueJohnDoe()
    {
        var id = $"{_uniqueId}";

        if (id.Length == 1)
        {
            id = $"00{id}";
        }
        if (id.Length == 2)
        {
            id = $"0{id}";
        }
        var unique =
            UserData.From(
                id, //"" + uniqueId,
                NameData.From("John", "Doe"),
                ContactData.From("*****@*****.**", "+1 212-555-1212"));

        ++_uniqueId;

        var serialized = JsonSerialization.Serialized(unique);

        return(serialized);
    }