This either means that the username and password information in your `wp-config.php` file is incorrect我能够在没有问题的情况下运行wp config create和wp db create命令,并且创建了一个数据库,因此我知道数据库用户名和密码是正确的。我错过了一步吗?Version 17.6.0: Tue May 8 15:22:16 PDT 2018; root:xnu-4570.61.1~1/RELEASE_X86_64