POST api/user/logout

 
        //REQUEST  
        string uri = "http://localhost/cgrestapi/api/authenticate/user";
        HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);
        //Assumption: CGRestAPI is configured to use WIA
        webRequest.Credentials = CredentialCache.DefaultCredentials;
        webRequest.Method = "POST";
        webRequest.ContentType = "application/json";
        var loginData = JsonConvert.SerializeObject(new
                                                    {
                                                        username = "hq\\apitest",
                                                        password = "apitest"
                                                    }, Formatting.Indented);

        using (Stream dataStream = webRequest.GetRequestStream())
        {
            using (var streamWriter = new StreamWriter(dataStream))
            {
                using (var writer = new JsonTextWriter(streamWriter))
                {
                    writer.WriteRaw(loginData);
                }
            }
        }
        HttpWebResponse httpWebResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();
            
        //RESPONSE    
        HttpWebResponse httpWebResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();
        Stream responseStream = httpWebResponse.GetResponseStream();
        using (var streamReader = new StreamReader(responseStream))
        {
            IDictionary responseData = new Hashtable();
            var result = JsonConvert.DeserializeObject(streamReader.ReadToEnd());
            if (result != null)
            {
                foreach (JProperty prop in ((Newtonsoft.Json.Linq.JObject)result).Properties())
                {
                    responseData[prop.Name] = ((Newtonsoft.Json.Linq.JValue)(prop.Value)).Value;
                }                    
                string sessionId = responseData["sessionId"].ToString());
                string userId = responseData["userId"].ToString());
            }
        }