import Medusa from "@medusajs/medusa-js"
const medusa = new Medusa({ baseUrl: MEDUSA_BACKEND_URL, maxRetries: 3 })
// must be previously logged in or use api token
medusa.admin.collections.create({
  title: 'New Collection'
})
.then(({ collection }) => {
  console.log(collection.id);
});