batchProcessing.js

import fetch from 'node-fetch'

usersList = ['user1', 'user2', ...'usern']

   let userRequests = []
    let userIndex = 0
    for (let i = 0; i < 2; i++) {
      for (let j = 0; j < 20; j++) {
        userRequests.push(getEachUser(usersList[userIndex]))
        userIndex++
      }
      await Promise.all(userRequests).then((responseData) => {
        responseData.forEach((element) => {
          const statusCode = element[0]
          const user = element[1]
          assert.equal(statusCode, 200, 'API call failed for user ' + user)
        })
      })
      userRequests.splice(0, userRequests.length)
    }