public async Task <IActionResult> Create(TopicForCreation topicForCreation)
        {
            var entity = new Topic
            {
                Title       = topicForCreation.Title,
                Description = topicForCreation.Description,
                CreatedById = topicForCreation.CreatedById
            };

            await repository.Create(entity);

            await repository.Save();

            return(Ok());
        }