折腾：
【已解决】WordPress网站更新wp-config.php后报错：Error establishing a database connection
期间，去PhpMyAdmin中创建新用户
点击：新增用户账户
xxx_it
点击 执行
CREATE USER 'xxx_it'@'%' IDENTIFIED WITH mysql_native_password AS '***';GRANT ALL PRIVILEGES ON *.* TO 'xxx_it'@'%' REQUIRE NONE WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
