密码存储在用户而不是usermeta中。我会把两张表都抄过来，这样就行了。

 `wp_users` (
  `ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `user_login` varchar(60) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_pass` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_nicename` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_email` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_url` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_registered` datetime NOT NULL DEFAULT \'0000-00-00 00:00:00\',
  `user_activation_key` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  `user_status` int(11) NOT NULL DEFAULT \'0\',
  `display_name` varchar(250) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT \'\',
  PRIMARY KEY (`ID`),
  KEY `user_login_key` (`user_login`),
  KEY `user_nicename` (`user_nicename`),
  KEY `user_email` (`user_email`)
)