protected void btnStoreNewUser_Click(object sender, EventArgs e)
        {
            litStoreNewUserResult.Text = litStoreNewUserError.Text = "";
            try
            {
                long userIdResult;
                var  responseStatus = client.StoreNewUser(out userIdResult,
                                                          txtStoreNewUserEmail.Text,
                                                          txtStoreNewUserPassword.Text,
                                                          txtStoreNewUserUsername.Text);

                if (responseStatus.ErrorCode != null)
                {
                    litStoreNewUserError.Text = responseStatus.ErrorCode.ToEnglish();
                    return;
                }

                litStoreNewUserResult.Text = "New User Id: " + userIdResult;
                var userIds = new List <string>(txtGetUsersUserIds.Text.Split(','))
                {
                    userIdResult.ToString()
                }.Where(x => !string.IsNullOrEmpty(x.Trim()));

                txtGetUsersUserIds.Text = string.Join(",", userIds.ToArray());
            }
            catch (Exception ex)
            {
                litStoreNewUserError.Text = ex.Message;
            }
        }