winter/modules/backend/models/UserPreferences.php

<?php namespace Backend\Models;

use Exception;
use BackendAuth;
use October\Rain\Database\Model;
use System\Classes\SystemException;
use October\Rain\Auth\Models\Preferences as PreferencesBase;

class UserPreferences extends PreferencesBase
{
    /**
     * @var string The database table used by the model.
     */
    protected $table = 'backend_user_preferences';

    public $timestamps = false;

    protected static $cache = [];

    /**
     * Checks for a supplied user or uses the default logged in. You should override this method.
     * @param mixed $user An optional back-end user object.
     * @return User object
     */
    public function resolveUser($user)
    {
        $user = BackendAuth::getUser();
        if (!$user)
            throw new SystemException(trans('backend::lang.user.preferences.not_authenticated'));

        return $user;
    }
}