private void RemoveTag()
        {
            Author author = _authorRepository.Get(_authorId);

            Console.WriteLine($"Which tag would you like to remove from {author.FullName}?");
            List <Tag> tags = author.Tags;

            for (int i = 0; i < tags.Count; i++)
            {
                Tag tag = tags[i];
                Console.WriteLine($" {i + 1}) {tag.Name}");
            }
            Console.Write("> ");

            string input = Console.ReadLine();

            try
            {
                int choice = int.Parse(input);
                Tag tag    = tags[choice - 1];
                _authorRepository.DeleteTag(author.Id, tag.Id);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Invalid Selection. Won't remove any tags.");
            }
        }