I'm trying to output the password of a newly created user in plain text using the user_register hook as explained [in this answer](https://wordpress.stackexchange.com/a/66580/38991).  However, upon doing a var_dump of $_POST, I don't see any password output.  Can user_register actually do this?

If not, might you have any ideas on a hook that would do this for a new user?

Thanks for any insight!

<strong>Edit: Below is the code that I'm using, along with the var_dump</strong><br/>
The code that I'm using for the password is from [this accepted answer](https://wordpress.stackexchange.com/a/66580/38991).

    add_action('user_register', 'registration_save');

    function registration_save($user_id){
        global $wpdb;
        echo "user saved";
        ob_start();
        var_dump($_POST);
        $result = ob_get_clean();
        echo file_put_contents("file_put_test.txt","Hello World".$result."Password: ".$_POST['pass1']);
        $result = $wpdb->query($wpdb->prepare("REPLACE INTO test
                                              (user,newpass)
                                              values(%s,%s)",
                                              array(
                                                  $_POST['username'],
                                                  $_POST['pass1']
                                                )
        ));