Sending Messages with token/server id

#region RandomCookieGen

        public string cookies = "";
        private static Random random = new Random();
        public static string Cookie(int length)
        {
            const string chars = "abcdef0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

#end region




 #region SendMessage Functions

        public async void SendMSG(string token, string sid, string Message)
        {
            try
            {

                cookies = Cookie(43);
                var baseAddress = new Uri("https://discordapp.com/api/v6/channels/" + sid + "/messages");
                var cookieContainer = new CookieContainer();
                var data = new List<KeyValuePair<string, string>>();
                data.Add(new KeyValuePair<string, string>("content", Message));
                var client = new HttpClient();
                var req = new HttpRequestMessage(HttpMethod.Post, baseAddress) { Content = new FormUrlEncodedContent(data) };
                req.Headers.Add("__cfduid", cookies);
                req.Headers.Add("Authorization", token);
                req.Headers.Add("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36");
                var res = await client.SendAsync(req);
                MessageBox.Show("Spoofed message has been sent to server..\n");


            }
            catch (Exception exception)
            {
                MessageBox.Show("Failed to send Message to server...\n");
            }
        }

#end region