const Starling = require('starling-developer-sdk')
// or
import Starling from 'starling-developer-sdk'

const client = new Starling({
  // apiUrl: 'https://api-sandbox.starlingbank.com',
  accessToken: '<oauth access token>'
})

client.account.getAccounts()
  .then(({ data }) => console.log(data))
  .catch(err => console.log(err))