public function get_accounts()
 {
     $accounts = RegisterAccount::select('id', 'name', 'phone')->where('user_id', Session::get('user.id'))->get();
     if (!isset($accounts)) {
         return Response::json(array('error_code' => 1, 'message' => 'Unkown Error'));
     }
     return Response::json(array('error_code' => 0, 'accounts' => $accounts));
 }