egg-node中{app_root}/config/config.prod.js文件里的config.passportLocal是指的哪里的用户名和密码

// passport config.passportGithub = { key: process.env.EGG_PASSPORT_GITHUB_CLIENT_ID || '', secret: process.env.EGG_PASSPORT_GITHUB_CLIENT_SECRET || '', };

config.passportLocal = { usernameField: '', passwordField: '', };