static function changePWD($in)
 {
     $q = new Query();
     $q->fields = array('id' => '');
     $q->sql = '
     SELECT id FROM usu_usuario WHERE 
     login="******" AND
     pwd = "' . crypt($in['pwd-old'], '$4a$85$estoesparati$') . '"
     ';
     $q->data = NULL;
     $data = $q->exe();
     if ($data && $in['pwd-new-1'] == $in['pwd-new-2']) {
         $q->fields = array('id' => '');
         $q->sql = '
         UPDATE usu_usuario SET pwd="' . crypt($in['pwd-new-1'], '$4a$85$estoesparati$') . '" WHERE id="' . $in['user_id'] . '"
         ';
         // print $q->sql;
         $q->data = NULL;
         $q->exe();
     }
 }