public List <ExternalUser> GetAllExternalUsers(RequestBase req)
        {
            List <ExternalUser> result = new List <ExternalUser>();

            try
            {
                SqlSvrDAL dal = new SqlSvrDAL(req.ClientInfo);
                result = dal.GetAllExternalUsers();
            }
            catch (Exception ex)
            {
                //LogHelper.AddLog("ExternalUserController,GetAllExternalUsers", ex.Message, ex.StackTrace, "HCL.Academy.Service", req.ClientInfo.emailId);
                TelemetryClient telemetry = new TelemetryClient();
                telemetry.TrackException(ex);
            }
            return(result);
        }