code: def get_tags(blog_id, username, password):
      
      authenticate(username, password)
      site = Site.objects.get_current()
      return [tag_structure(tag, site)
              for tag in Tag.objects.usage_for_queryset(
                  Entry.published.all(), counts=True)]
docs: wp.getTags(blog_id, username, password)
      => tag structure[]