private async Task ExecuteInternal()
        {
            while (true)
            {
                var users = await _flairs.GetUsersForUpdateAsync(MaxUsersPerLoop);

                var subReddits = await _subReddits.GetAllAsync();

                if (!users.Any())
                {
                    await Task.Delay(NoUsersWaitInterval);

                    continue;
                }

                var flairParams = new List <UserFlairParameter>();

                foreach (var user in users)
                {
                    flairParams.Add(new UserFlairParameter
                    {
                        Name = user.Name,
                        Text = await GetFlairTextAsync(user)
                    });
                }

                foreach (var sub in subReddits)
                {
                    if (!await _reddit.SetUserFlairsAsync(sub.Name, flairParams))
                    {
                        throw new InvalidOperationException($"Update flair failed on /r/{sub.Name}.");
                    }
                }

                if (!await _flairs.SetUpdatedAsync(users))
                {
                    throw new InvalidOperationException("Unable to clear flair update flag.");
                }

                await Task.Delay(1);
            }
        }