Override change_password function

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I am trying to override a single page; specifically the function change_password in Concrete\Controller\SinglePage\Dashboard\Users\Search (see:https://github.com/concrete5/concrete5/blob/develop/web/concrete/con... But I can't find a method that works. I've tried copying the file from the core into /application/controllers/single_page/dashboard/users/search.php and tried /application/single_page/dashboard/users/search.php. When I look at Concrete\Core\Page\Page::getPageController() I don't see an option to override the location at all.