[DisableConcurrentExecution(1000)]
        public async Task SyncAll()
        {
            var list = new List<Task<List<StaffEntity>>> {SynchronizeHr(), SynchronizeHeadHr(), SynchronizeManager()};

            var comparer = new CustomEqualityComparer<StaffEntity>(
                (a, b) => a.Sid == b.Sid,
                a => a.Sid.GetHashCode());

            var result = (await Task.WhenAll(list)).SelectMany(x=>x).Distinct(comparer).ToList();

            await _locker.WaitAsync();
            try
            {
                var users = await StaffRepository.WhereAsync(x=>!x.IsDeleted);

                var diff = result.Except(users.Intersect(result, comparer), comparer).ToList();

                if (diff.Any())
                {
                    foreach (var staff in diff)
                    {
                        await StaffRepository.CreateAsync(staff);
                        await StaffRepository.SaveAsync();
                    }
                }

            }
            finally
            {
                _locker.Release();
            }
        }