Reimplement lodash groupby

groupBy.js

const users = [
  { name: 'Jim', color: 'blue' },
  { name: 'Sam', color: 'blue' },
  { name: 'Eddie', color: 'green' },
];
 
const usersByColor = users.reduce((acc, value) => {
  if (!acc[value.color]) {
    acc[value.color] = [];
  }
 
  acc[value.color].push(value);
 
  return acc;
}, {});