internal class User
    {
        internal string _username, _password, _token;

        internal User(string username, string password, string token)
        {
            _username = username;
            _password = password;
            _token = token;

        internal string Username
        {
            get { return _username; }
        }

        internal string Password
        {
            get { return _password; }
        }

        internal string Token
        {
            get { return _token; }
        }
    }