pick replace

function pickReplace(obj, objPick){
  let no = {};
  for(let k of objPick){
    if(k in obj){
      no[k] = obj[k];
    }
  }
  return no;
}

let obj = user; // Example of object
let objPick = ['id', 'firstName', 'email']; // what we would like to pick from our obj

let entry = pickReplace(obj, objPick);