public static Me GetAccount(string username, string password)
        {
            var client = new RestClient(PivotalTrackerRestEndpoint.SSLENDPOINT)
                             {
                                 Authenticator = new HttpBasicAuthenticator(username, password)
                             };

            var request  = new RestRequest(AuthenticationEndpoint);
            var response = client.ExecuteRequestWithChecks<Me>(request);

            return response;
        }
        public static AuthenticationToken Authenticate(string username, string password)
        {
            var client = new RestClient(PivotalTrackerRestEndpoint.SSLENDPOINT)
                             {
                                 Authenticator = new HttpBasicAuthenticator(username, password)
                             };

            var request  = new RestRequest(AuthenticationEndpoint);
            request.AddQueryParameter("fields", "api_token");
            var response = client.ExecuteRequestWithChecks<AuthenticationToken>(request);

            return response;
        }