public function findUsers($searchString, $userID)
 {
     if (empty($searchString)) {
         return array();
     } else {
         $validator = Validator::make(array('email' => $searchString), array('email' => 'email'));
         if ($validator->fails()) {
             $userModel = new User();
             $users = $userModel->searchName($searchString, $userID);
         } else {
             $users = User::LikeEmail($searchString)->NotMyself($userID)->get();
         }
         $output = array();
         foreach ($users as $user) {
             $output[$user->id] = $user->first_name . ' ' . $user->last_name;
         }
         return $output;
     }
 }