public function getUsuarios($usuario)
 {
     $sql = 'SELECT *, (case when fecpass < getdate() then "1" else "0" end) as cambio_pass
             FROM usuarios U
             JOIN agenc_na AN ON (AN.id=U.id_agen)
             WHERE U.clave="' . $usuario . '"';
     //echo $sql;
     $datos = $this->_db->consulta($sql);
     if ($this->_db->numRows($datos) > 0) {
         $userArray = $this->_db->fetchAll($datos);
         $objetosUser = array();
         $userObj = new usuarioDTO();
         foreach ($userArray as $usdb) {
             $userObj->setClave(trim($usdb['clave']));
             $userObj->setPassword(trim($usdb['pasword']));
             $userObj->setCambioPass(trim($usdb['cambio_pass']));
             $userObj->setNombre(trim($usdb['nombre']));
             $userObj->setCodigo(trim($usdb['codigo']));
             $userObj->setDoctoD(trim($usdb['dctod']));
             $userObj->setDoctoH(trim($usdb['dctoh']));
             $userObj->setAgencia(trim($usdb['agencia']));
             $userObj->setIdAgen(trim($usdb['id_agen']));
             $userObj->setMarkup(trim($usdb['markup']));
             $userObj->setFechaPass(trim($usdb['fecpass']));
             $userObj->setDepto(trim($usdb['depto']));
             $userObj->setAtipoa(trim($usdb['atipoa']));
             $userObj->setRut(trim($usdb['rut']));
             $userObj->setEmail(trim($usdb['email']));
             $userObj->setEmailOpera(trim($usdb['email_opera']));
             $objetosUser[] = $userObj;
         }
         return $objetosUser;
     } else {
         return false;
     }
 }