async-await.js

const fetch = require('node-fetch')

// async function fetchAvatarUrl (userId) {
//   const response = await fetch(`https://catappapi.herokuapp.com/users/${userId}`)
//   const data = await response.json()
//   return data.imageUrl
// }

/*
function fetchAvatarUrl (userId) {
  return fetch(`https://catappapi.herokuapp.com/users/${userId}`)
    .then(response => response.json())
    .then(data => data.imageUrl)
}
*/

const result = fetchAvatarUrl(123)
console.log(result)