public async Task <IActionResult> PutAlbum([FromRoute] int id, [FromBody] Album album)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != album.AlbumId)
            {
                return(BadRequest());
            }

            _context.Entry(album).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!AlbumExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }
        public async Task <IActionResult> Post([FromBody] Album album)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.Albums.Add(album);
            await db.SaveChangesAsync();

            return(CreatedAtAction("Post", new { id = album.AlbumId }, album));
        }