/**
  * Return form for joining a team
  * 
  * @param  int $userId
  * @return Response
  */
 public function getAdd($userId)
 {
     $ids = DB::table('team_user')->whereUserId($userId)->lists('team_id');
     if (sizeof($ids) > 0) {
         $teams = Team::whereNotIn('id', $ids)->get();
     } else {
         $teams = Team::all();
     }
     if (sizeof($teams) > 0) {
         return View::make('teams::admin_members_team', compact('teams', 'user'));
     } else {
         return Response::make('');
     }
 }