Keystone Tutorial: cannot read property 'id' of undefined - node.js

Question

I was following the tutorial on starting KeystoneJS from scratch. But when I got to the second part of the tutorial, creating data models, I got this error:
Error thrown for request: /keystone/
TypeError: Cannot read property 'id' of undefined
at IndexRoute (/root/websie/node_modules/keystone/admin/server/routes/index.js:39:16)
at Layer.handle [as handle_request] (/root/websie/node_modules/express/lib/router/layer.js:95:5)
at next (/root/websie/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/root/websie/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/root/websie/node_modules/express/lib/router/layer.js:95:5)
at /root/websie/node_modules/express/lib/router/index.js:281:22
at Function.process_params (/root/websie/node_modules/express/lib/router/index.js:335:12)
at next (/root/websie/node_modules/express/lib/router/index.js:275:10)
at /root/websie/node_modules/keystone/admin/server/app/createDynamicRouter.js:26:3
at Layer.handle [as handle_request] (/root/websie/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/root/websie/node_modules/express/lib/router/index.js:317:13)
at /root/websie/node_modules/express/lib/router/index.js:284:7
at Function.process_params (/root/websie/node_modules/express/lib/router/index.js:335:12)
at next (/root/websie/node_modules/express/lib/router/index.js:275:10)
at handleUploadedFiles (/root/websie/node_modules/keystone/lib/uploads.js:6:54)
at Layer.handle [as handle_request] (/root/websie/node_modules/express/lib/router/layer.js:95:5)
GET /keystone/ 500 8.835 ms
Since I'm new to Keystone JS, I don't quite know if this problem is with the code itself or the database.
Things to consider:
This is run on a linux environment
MongoDB is freshly installed
These are all the files so far:
keystone.js
const keystone = require('keystone')
keystone.init({
'cookie secret': 'SECRET KEY',
'name' : 'theproject',
'user model' : 'User',
'auth' : 'true',
'auto update' : 'true',
});
keystone.import('models');
keystone.start();
User.js:
const keystone = require('keystone');
var User = new keystone.List('User');
User.add({
displayName: { type: String },
password: { type: keystone.Field.Types.Password },
email: { type: keystone.Field.Types.Email, unique: true },
})
User.schema.virtual('canAccessKeystone').get(function () {
return true;
});
User.defaultColumns = 'id, displayName, email';
User.register();

Answer 1

Your User model doesn't have an "id" attribute. So when you set your User.defaultColumns to "id" it doesn't find anything.
All models do however have an "_id" attribute.
I would just remove "id" from your default columns and move forward.
User.defaultColumns = 'displayName, email';
If that doesn't fix it you might be requesting the id elsewhere.