/// <summary>
/// Returns all settings, cached for 10 min, returns null if no setting found.
/// </summary>
/// <returns></returns>
/// <remarks>
/// TODO needs to get only settings from meta.
/// </remarks>
private async Task <List <Meta> > GetAllSettingsAsync()
{
return(await _cache.GetAsync(CACHE_KEY_ALL_SETTINGS, new TimeSpan(0, 10, 0), async() =>
{
return await _repo.AllAsync();
}));
}