Sample plugin to display the welcome screen to any new member login for the first time in MODX Revolution manager

plugin.php

<?php
/**
 * A sample plugin to display the "welcome message" to all users, login for the first time in Revo manager
 *
 * @var modX $modx
 * @var array $scriptProperties
 * @var modPlugin $this
 *
 * @see modPlugin::process()
 *
 * @event OnManagerPageBeforeRender 
 * @event OnUserFormSave
 */

switch ($modx->event->name) {
    case 'OnManagerPageBeforeRender':
        // Here we need to check if we are displaying the "welcome" controller
        if (!$modx->event->params['controller'] instanceof WelcomeManagerController) {
            return;
        }
        // Assume we always want to display the welcome message, no matter how global welcome_screen setting is configured
        $show = true;
        // Check the current user "preference"
        $setting = $modx->getObject('modUserSetting', [
            'key' => 'welcome_screen',
            'user' => $modx->user->get('id'),
        ]);
        if ($setting) {
            // user option found, let's use it instead
            $show = (bool) $setting->get('value');
        }
        // Set the option temporarily so the welcome controller could do whatever it takes
        $modx->setOption('welcome_screen', $show);
        break;

    case 'OnUserFormSave':
        // A user is saved, let's make sure to process only when a user is created
        if ($modx->event->params['mode'] !== modSystemEvent::MODE_NEW) {
            return;
        }
        // User has just been created, assume we want to create a user setting
        /** @var modUser $user */
        $user = $modx->event->params['object'];
        // First make sure the setting does not already exist
        /** @var modUserSetting||null $setting */
        $setting = $modx->getObject('modUserSetting', [
            'key' => 'welcome_screen',
            'user' => $user->get('id'),
        ]);
        if (!$setting) {
            // No user setting found, let's create it!
            /** @var modUserSetting $setting */
            $setting = $modx->newObject('modUserSetting');
            $setting->fromArray([
                'key' => 'welcome_screen',
                'user' => $user->get('id'),
                'xtype' => 'combo-boolean',
                'area' => 'manager',
                'namespace' => 'core',
            ], '', true);

        }
        $setting->set('value', true);
        $setting->save();
        break;
}

return;