ustated next

userModel.js

import React from "react";
import axios from "axios";

function useUsers() {
  const [userById, setUsersById] = React.useState({});
  const [userIds, setUsers] = React.useState([]);

  const getUserList = async () => {
    const result = axios.get("/api/users");

    setUsersById(
      result.reduce((obj, item) => {
        return {
          ...obj,
          [item.id]: item
        };
      }, {})
    );

    setUsers(result.map(item => item.id));
  };
  return { getUserList, userById, userIds };
}