async load(){

let a = await fetch('url')
let id = await a.json()
let b = await fetch('id')
}

fetch(`USER_URL`)
  .then(response => response.json())
  .then(user => fetch(`PROFILE_URL/${user.id}))
  .then(response => response.json())
  .then(profile => /* do whatever you want */)
  .catch(error => /* handle any errors */);