Enabling Virtuals In Mongoose Lean Mode (in a FeathersJs service)

user.service.js

// user.service.js
import createService from 'feathers-mongoose';
// other imports...

export default (app) => {
  const Model = createModel(app);
  // ...

  const options = {
    Model,
    lean: {virtuals: true},     // add this line
  };

  const service = createService(options);

  // ...
};