public static HttpRequestClient InitializeHttpRequestClientWithWrongCredential()
        {
            //Authenication Credentias
            const string apikey = "WrongApikey";

            const string password = "******";

            const Mode mode = Mode.Sandbox;


            AuthCredential authCredential = new AuthCredential(apikey, password, mode);

            HttpRequestClient httpRequestClient = HttpRequestClient.GetInstance(authCredential);

            return(httpRequestClient);
        }
        public static HttpRequestClient InitializeHttpRequestClientWithCorrectCredential()
        {
            //Authenication Credentias
            const string apikey = "6A19EA2A706041A599375CC95FF08809";

            const string password = "******";

            const Mode mode = Mode.Sandbox;


            AuthCredential authCredential = new AuthCredential(apikey, password, mode);

            HttpRequestClient httpRequestClient = HttpRequestClient.GetInstance(authCredential);

            return(httpRequestClient);
        }