public function ActivitiesPage($user_id)
 {
     $user = UserMod::where('id', $user_id)->where('role', '=', 'Administrator')->first();
     if (UserMod::where('id', $user_id)->where('role', '=', 'Administrator')->exists()) {
         if (Activity::exists()) {
             $activities = Activity::with('module')->get();
             return View::make("Admin-activities")->with('activities', $activities)->with('user', $user);
         } else {
             Session::flash('no_activities', "There are no existed activities in our records");
             return View::make("Admin-activities");
         }
     } else {
         Session::flash('failed', "Something went wrong, please try again!");
         return back()->withInput();
     }
 }