public function postUnwatch(Request $request)
    {
        $item = Item::findOrFail($request->input('item_id'));

        if (!Auth::user()->watching->contains($item)) {
            return redirect()->back()->withErrors(["You aren't watching this item."]);
        }

        Auth::user()->watching()->detach($item);

        return redirect()->back()->withStatus($item->name.' has been removed from your watched items.');
    }