xtu_mall/app/admin/model/AdminUser.php

<?php
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// +----------------------------------------------------------------------
// | 后台用户管理
// +----------------------------------------------------------------------
namespace app\admin\model;

use think\Model;

class AdminUser extends Model
{
    // 自动写入时间戳
    protected $autoWriteTimestamp = true;
    // 设置当前模型对应的完整数据表名称
    protected $name = 'admin';

    public function getLastLoginTimeAttr($value)
    {
        return date('Y-m-d H:i:s', $value);
    }

    public static function onBeforeWrite($row)
    {
        $changed = $row->getChangedData();
        //如果修改了用户或或密码则需要重新登录
        if (isset($changed['username']) || isset($changed['password']) || isset($changed['salt'])) {
            $row->token = '';
        }
    }
}