code: def delete_post(apikey, post_id, username, password, publish):
      
      user = authenticate(username, password, 'zinnia.delete_entry')
      entry = Entry.objects.get(id=post_id, authors=user)
      entry.delete()
      return True
docs: blogger.deletePost(api_key, post_id, username, password, 'publish')
      => boolean