public async Task <IActionResult> OnPostAddToUserCollections(int id)
        {
            var idString = User.Claims.FirstOrDefault(x => x.Type == ClaimTypes.NameIdentifier).Value;
            var uid      = int.Parse(idString);

            var usr = await _userController.GetByIdAsync(uid);


            await _userController.AddCollectionToUser(id, usr);

            return(Page());
        }