Twilio send sms api request using http post mentod in asp.net - asp.net-mvc

Question

I am learning twilio send sms tool.
I want to make post url request for send message in asp.net mvc application.
I tired some code but could not get safisfied o/p.
There is an error that is authentication sid or auth token is invalid.
Can anyone help me how to make post request for twilio send sms api?
try{
const string accountSid = "AC255e61580d73904b2a5e5a5e39c715f0";
const string authToken = "AUTH_TOKEN";
const string url = "https://api.twilio.com/2010-04-01/Accounts/" + accountSid + "/Messages.json";
TwilioRestClient client = new TwilioRestClient(accountSid, authToken);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
var authInfo = accountSid +":"+ authToken;
authInfo = Convert.ToBase64String(Encoding.UTF8.GetBytes(authInfo));
request.Method = "POST";
var postData = "{\"To\":" + "\"" + sms.ToNumber + "\"" + ", \"From\":" + "\"" + fromNumber + "\"" + ", \"Body\":" + "\"" + sms.Body + "\"}";
var data = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
Stream writer = null;
writer = request.GetRequestStream();
writer.Write(data, 0, data.Length);
writer.Close();
request.Headers["Authorization"] = "Basic " + authInfo;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string content = reader.ReadToEnd();
msg = client.SendMessage("[phone] ", sms.ToNumber,sms.Body);
}
catch (WebException ex)
{
using (var stream = ex.Response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
string err =reader.ReadToEnd();
}
}
I have an error :
{"code": 20003, "detail": "Your AccountSid or AuthToken was incorrect.", "message": "Authentication Error - No credentials provided", "more_info": "https://www.twilio.com/docs/errors/20003", "status": 401}

Answer 1

Please check if you are using the Live credentials(accountSid,authToken) on your Twilio Account.
The API does the post already:
https://www.twilio.com/docs/api/twiml/sms/twilio_request
You don't need all this code below.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
var authInfo = accountSid +":"+ authToken;
authInfo = Convert.ToBase64String(Encoding.UTF8.GetBytes(authInfo));
request.Method = "POST";
var postData = "{\"To\":" + "\"" + sms.ToNumber + "\"" + ", \"From\":" + "\"" + fromNumber + "\"" + ", \"Body\":" + "\"" + sms.Body + "\"}";
var data = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
Stream writer = null;
writer = request.GetRequestStream();
writer.Write(data, 0, data.Length);
writer.Close();
request.Headers["Authorization"] = "Basic " + authInfo;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string content = reader.ReadToEnd();