public async Task <IActionResult> AddToFavorites(long ideaId)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            var result = await _ideaService.AddToFavoritesAsync(ideaId);

            if (!result.Succeeded)
            {
                return(BadRequest(result.Errors));
            }

            return(Ok());
        }