private async void btnRemoveFavorite_Clicked(object sender, EventArgs e)
        {
            var req = new FavoriteEstateUpsertRequest()
            {
                EstateId = est.EstateId,
                UserId   = SignedInUser.User.UserId
            };
            await userService.DeleteFavoriteEstate(req.UserId, req.EstateId);

            var estate = model.Estate;
            await Navigation.PushAsync(new EstateDetailPage(estate));
        }