public async Task StoreSessions(bool storeCompletedSessionsWithNoItems = true)
        {
            var storageTasks = new List <Task>();

            foreach (var session in Sessions)
            {
                switch (session.Status)
                {
                case "COMPLETED":
                    if (session.Items.Count > 0)
                    {
                        storageTasks.Add(sessionStore.PutSession(session));
                    }
                    else if (storeCompletedSessionsWithNoItems)
                    {
                        storageTasks.Add(sessionStore.PutSession(session));
                    }
                    else
                    {
                        storageTasks.Add(sessionStore.DeleteSession(session.Id));
                    }
                    break;

                default:
                    storageTasks.Add(sessionStore.PutSession(session));
                    break;
                }
            }
            await Task.WhenAll(storageTasks);
        }