public async Task <IActionResult> Create(GroupSubscriptionModel model)
        {
            var username = ApplicationUtility.GetTokenAttribute(Request.Headers["Authorization"], "sub");
            var service  = new StudentClassificationRepository(connString);
            await service.CreateGroupSubscription(model, username);

            var response = new GenericResponse <string>()
            {
                IsSuccess    = true,
                Message      = "Group subscription created successfully.",
                ResponseCode = 200,
                Result       = "Success"
            };

            return(Ok(response));
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="model"></param>
        /// <param name="actor"></param>
        /// <returns></returns>
        public async Task CreateGroupSubscription(GroupSubscriptionModel model, string actor)
        {
            try
            {
                await _connection.OpenAsync();

                var cmd = new MySqlCommand("Create_GroupSubscription", _connection);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("UserIdVal", model.Userid);
                cmd.Parameters.AddWithValue("GroupIdVal", model.GroupId);
                cmd.Parameters.AddWithValue("StartDateVal", model.StartDate);
                cmd.Parameters.AddWithValue("CreatedByValue", actor);
                cmd.ExecuteNonQuery();
            }
            catch { throw; }
            finally { await _connection.CloseAsync(); }
        }