我最近使用指南here初始化了Keystone应用。我在代码中碰到的另一件事是在前端添加一个Next.js应用程序，并更改了mongodb连接字符串以指向我的MongoDB Atlas集群。我在Heroku上部署了此应用程序，它可以连接到数据库，并且一切正常，但是在尝试登录时，单击“登录”后，按钮会显示加载指示器一秒钟，然后再次显示登录页面。>

我已阅读文档并尝试放入

config: {
    identityField: 'email',secretField: 'password'
  }

，但无济于事。真的不确定从这里还能去哪里。

这是我的Keystone定义：

const keystone = new Keystone({
  name: PROJECT_NAME,adapter: new Adapter({
    mongoUri: 'mongodb+srv://stratus:WjbsEnmyBV80AJ6H@cluster0-qe4bs.azure.mongodb.net/stratus?retryWrites=true&w=majority',useNewUrlParser: true
  }),});

// access control functions
const userIsAdmin = ({ authentication: { item: user } }) => Boolean(user && user.isAdmin);
const userOwnsItem = ({ authentication: { item: user } }) => {
  if (!user) {
    return false;
  }
  return { id: user.id };
};
const userIsAdminOrOwner = auth => {
  const isAdmin = access.userIsAdmin(auth);
  const isOwner = access.userOwnsItem(auth);
  return isAdmin ? isAdmin : isOwner;
};
const access = { userIsAdmin,userOwnsItem,userIsAdminOrOwner };

keystone.createList('User',{
  fields: {
    name: { type: Text },email: {
      type: Text,isUnique: true,},isAdmin: { type: Checkbox },password: {
      type: Password,// To create an initial user you can temporarily remove access controls
  access: {
    read: access.userIsAdminOrOwner,update: access.userIsAdminOrOwner,create: access.userIsAdmin,delete: access.userIsAdmin,auth: true,});

const authStrategy = keystone.createAuthStrategy({
  type: PasswordauthStrategy,list: 'User',config: {
    identityField: 'email',secretField: 'password'
  }
});

module.exports = {
  keystone,apps: [
    new GraphQLApp(),// To create an initial user you can temporarily remove the authStrategy below
    new AdminUIApp({ enableDefaultRoute: true,authStrategy }),new NextApp({ dir: 'client'})
  ],};

我的Heroku日志中没有看到任何错误。任何帮助深表感谢！