public async Task <IActionResult> GetWishListItem(int bookId) { var userId = GetUserId(); if (userId == "error") { return(Unauthorized(new { message = "unauthorized" })); } var wishItem = await _wishListService.GetWishItem(bookId, userId); if (wishItem == null) { return(Ok(new { isLike = false })); } return(Ok(new { isLike = true })); }