function getUserId() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve(Date.now())
    }, 2000)
  })
}


const users = [{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
},{
  firstName: "Andreas",
  lastName: "Iosifelis"
}, {
  firstName: "George",
  lastName: "Iosifelis"
}]


async function getUser(user) {
  return {
    ...user,
    id: await getUserId()
  }
}


async function getResult() {
  const promises = users.map(getUser)
  const result = await Promise.all(promises)

  console.log(result)
}

getResult()