randomChance.js

function randomIntInc(low, high) {
     return Math.floor(Math.random() * (high - low + 1) + low);
}

function createUsers(low, high) {
     let items = {};
 
     const generatedItems = randomIntInc(low, high);
     for (let i = 0; i < generatedItems; i++) {
         const item = {}
         item.uid = chance.guid();
         /* extra fields generated by chance */

         const parent = {}
         parent[item.uid] = item
         Object.assign(items, parent)
     }
 
     return items;
}