code: function AuthChallengeMessage(token) {
    var _token = token || new Buffer(0);
  
    Response.call(this, 0x0E);
  
    Object.defineProperty(this, 'token', {
      set: function(val) { _token = val; },
      get: function() { return _token; }
    });
  }
docs: AUTH_CHALLENGE message.
  
  @constructor
  @since protocol version 2