How do I fix the 'client.initIndex is not a function' error in Algolia with Firebase Functions?

I'm integrating Algolia with Google Cloud Firestore using Firebase Functions and encountering the error: TypeError: client.initIndex is not a function. The code I'm using is as follows:

TYPESCRIPTCopied
import { logger } from "firebase-functions";
import { algoliasearch } from "algoliasearch";
import { onRequest } from "firebase-functions/v2/https";
import {
  onDocumentCreated,
  onDocumentUpdated,
} from "firebase-functions/v2/firestore";
import { initializeApp } from "firebase-admin/app";
import { getFirestore } from "firebase-admin/firestore";

initializeApp();

// algolia config
const appID = 
const apiKey = 

const client = algoliasearch(appID, apiKey);
const index = client.initIndex('task_list')

export const updateTaskList = onDocumentUpdated(
  "new_users/{id}",
  async (event) => {
    const beforeUpdate = event.data.before.data();
    const afterUpdate = event.data.after.data();

    try {
      index.partialUpdateObjects(afterUpdate).then(({ id }) => {
        logger.log(id)
      });
    } catch(error) {

    }

    return null;
  }
);

I also need to update Algolia records using a unique identifier from the Firestore document. In my setup, this involves ensuring that the Firestore object includes the identifier (for example, the id field) so that it maps to Algolia’s objectID. Here’s a refined example:

TYPESCRIPTCopied
index.partialUpdateObjects(
  [{
    objectID: afterUpdate.id,
    ...afterUpdate,
  }]
).then(({ objectIDs }) => {
  logger.log(objectIDs);
});

This approach guarantees that the unique identifier from Firestore is correctly used for updates in Algolia. I'm looking for solutions or insights on why client.initIndex might not be recognized as a function and ensuring the unique identifier maps correctly. Any help would be appreciated.