Plugin to add custom fields doesn't recognize updates

<?php
switch ($modx->event->name) {
    case 'OnUserFormPrerender':
        /* if you want to add custom scripts, css, etc, register them here */
        break;
    case 'OnUserFormRender':
        $v = '';
        if (isset($scriptProperties['resource'])) {
            /* on the update screen, so get current values */
            $v = $id;
        } else {
            /* on the create screen, so nothing to do */
        }
        /* now do the HTML */
        $fields = '
        <p>Id is: '.$v.'</p>
        ';
        $modx->event->output($fields);
        break;
    case 'OnUserFormSave':
        /* do processing logic here. */
        break;
}
return;

if ($mode == modSystemEvent::MODE_NEW) {
    return
}

/* Your code here */

<?php
switch ($modx->event->name) {
    case 'OnUserFormPrerender':
        /* if you want to add custom scripts, css, etc, register them here */
        break;
    case 'OnUserFormRender':
        $v = '';
        if ($mode == modSystemEvent::MODE_UPD) {
            /* on the update screen, so get current values */
            $modx->addPackage('extenduser', MODX_CORE_PATH . 'components/extenduser/model/', 'ext_');
            $user = $modx->getObject('extUser', $id);
            $data = $user->getOne('Data');
        } else {
            /* on the create screen, so nothing to do */
        }
        /* now do the HTML */
        $fields = '
        /* lots of html goodies in here */
        ';
        $modx->event->output($fields);
        break;
    case 'OnUserFormSave':
        /* do processing logic here. */
        break;
}
return;

$user->getOne('Profile');

<?xml version="1.0" encoding="UTF-8"?>
<model package="extenduser" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM" tablePrefix="ext_">
    <!-- extend the modUser class -->
    <object class="extUser" extends="modUser">
        <composite alias="Data" local="id" class="Userdata" foreign="userdata_id" cardinality="one" owner="local" />
    </object>
 
    <object class="Userdata" table="userdata" extends="xPDOSimpleObject">
        <field key="userdata_id" dbtype="int" precision="11" phptype="integer" null="false" attributes="unsigned"/>
        <field key="coach_id" dbtype="int" precision="11" phptype="integer" null="false" attributes="unsigned"/>
        <field key="coach_desc" dbtype="varchar" precision="100" phptype="string" null="true" />
        <field key="parent_id" dbtype="int" precision="11" phptype="integer" null="false" attributes="unsigned"/>
        <field key="parent_desc" dbtype="varchar" precision="100" phptype="string" null="true" />
        <index alias="userdata_id" name="userdata_id" primary="false" unique="true" type="BTREE">
            <column key="userdata_id" length="" collation="A" null="false" />
        </index>
        <aggregate alias="extUser" local="userdata_id" foreign="id" cardinality="one" owner="foreign" />
    </object>
 </model>

$componentPath = $modx->getOption('extenduser.core_path', null, $modx->getOption('core_path') . 'components/extenduser/') . 'model/';
$modx->addPackage('extenduser', $componentPath, 'ext_');
$obj = $modx->newObject('extUser');
print_r($obj->toArray());