public async Task Delete(EntityDto <Guid> input)
{
var postId = input.Id;
var post = await _postRepository.GetAsync(postId);
var tags = await GetTagsOfPost(postId);
await _tagManager.DecreaseUsageCountOfTagsAsync(tags.Select(t => t.Id).ToList());
await _commentManager.DeleteCommentsOfPost(postId);
await _postManager.DeleteAsync(input.Id);
}