const getUserObject = user_id => {
  let userInfo = {};
  let ops = [
    getUser(user_id),
    getUserDetails(user_id),
    getOrders(user_id),
    getWishlist(user_id),
  ];

  return Promise.all(ops)
    .then(results => {
    userInfo = {
      "id": user_id,
      "username" : results[0].name,
      "email" : results[0].email,
      "gender" : results[1].gender,
      "age" : results[1].age,
      "state" : results[1].state,
      "orders" : [],
      "wishlist" : []
    }
    results[2].map(order => { userInfo.orders.push({ "product_id": order.product_id }) })
    results[3].map(wish => { userInfo.wishlist.push({ "product_id": wish.product_id }) })
    return userInfo
  }).catch(error => error);
}