hook2.js

// Hook two
module.exports = function () {
  return async function doSecondThing (context) {
    const { app, params, data } = context
    const { namesThatExist } = params

    const newNames = data.names.filter(name => !namesThatExist.includes(name))
    await app.service('service2').create(newNames)

    return context
  }
}