```coffeescript
App.User = DS.Model.extend
  firstName: DS.attr("string")
  lastName:  DS.attr("string")
  email:  DS.attr("string")
  role:  DS.attr("string")

App.CurrentUser = App.User.extend({})

App.Room = DS.Model.extend
  name: DS.attr("string")

App.Message = DS.Model.extend
  body:   DS.attr("string")
  type:   DS.attr("string")
  roomId: DS.attr("string")
  userId: DS.attr("string")
```

Add password field to User model
user
```coffeescript
App.User = DS.Model.extend
  firstName: DS.attr("string")
  lastName:  DS.attr("string")
  email:  DS.attr("string")
  role:   DS.attr("string")
  password: DS.attr("string")

App.CurrentUser = App.User.extend({})

App.Room = DS.Model.extend
  name: DS.attr("string")

App.Message = DS.Model.extend
  body:   DS.attr("string")
  type:   DS.attr("string")
  roomId: DS.attr("string")
  userId: DS.attr("string")
```
assistant