Second Pull Request - Project Course (ThreadBoard)

related to this [comment] (https://github.com/fpambid/Board_Exercises/pull/2/files#r17831810)
you may replace $where_params and $where_params2 with this po 
```php
$db->update('user', $values, array('id' = $this->id));
$db->update('thread', $values, array('user_id' = $this->id));
```