SampleCode.cs

        public string GetBearerToken(string clientID, string clientSecret)
        {
            Uri authUri = new Uri("https://auth.test.test-products.local/v1/oauth2/token");
            HttpWebRequest req = HttpWebRequest.CreateHttp(authUri);

            string basicToken = string.Format("Basic {0}",
                Convert.ToBase64String(Encoding.ASCII.GetBytes(clientID + ":" + clientSecret))
            );
            
            req.Headers.Add("Authorization", basicToken);
            req.ContentType = "application/json";
            req.Method = "POST";

            byte[] bytes = Encoding.ASCII.GetBytes(@"{'grant_type' : 'client_credentials','scope' : '*','expires_in' : '86400'}");

            req.ContentLength = bytes.Length;

            var s = req.GetRequestStream();

            s.Write(bytes, 0, bytes.Length);
            s.Close();

            dynamic obj;

            using (var res = req.GetResponse())
            using (var rs = res.GetResponseStream())
            using (var rdr = new StreamReader(rs))
            {
                obj = JsonConvert.DeserializeObject<dynamic>(rdr.ReadToEnd());
            }

            return obj.access_token.ToString();
        }

        public string GetConsumer(string bearer, string consumerId)
        {
            HttpWebRequest req =
                HttpWebRequest.CreateHttp(new Uri("https://consumer.test.test-products.local/v1/consumers/" + consumerId));

            req.Headers.Add("Authorization", bearer);
            req.Method = "GET";

            dynamic obj;

            using (var res = req.GetResponse())
            using (var rs = res.GetResponseStream())
            using (var rdr = new StreamReader(rs))
            {
                obj = JsonConvert.DeserializeObject<dynamic>(rdr.ReadToEnd());
            }

            return obj.ToString();
        }