TypeError: req.get is not a function

import { default as axios } from 'axios';
import fetch from 'node-fetch';
import { WebhookReceiver } from 'livekit-server-sdk';

// This is your Appwrite function
// It's executed each time we get a request
export default async ({ req, res, log, error }) => {
  const client = new Client();
  const functions = new Functions(client);
  const database = new Databases(client);
  
  client.setEndpoint('https://cloud.appwrite.io/v1')
    .setProject(process.env.APPWRITE_FUNCTION_PROJECT_ID)
    .setKey(process.env.APPWRITE_API_KEY);

  const ENDPOINT                                = process.env.MY_APPWRITE_ENDPOINT;
  const PROJECT_ID                              = process.env.APPWRITE_PROJECT_ID;
  const API_KEY                                 = process.env.APPWRITE_API_KEY;
  const DATABASE_ID                             = process.env.DATABASE_ID;
  const LIVEKIT_STREAMING_COLLECTION            = process.env.LIVEKIT_STREAMING_COLLECTION;
  const LIVE_KIT_API                            = process.env.LIVE_KIT_API;
  const LIVE_KIT_SEC_KEY                        = process.env.LIVE_KIT_SEC_KEY;
  const LIVE_KIT_WEBSOCKET                      = process.env.LIVE_KIT_WEBSOCKET;


  const receiver = new WebhookReceiver(LIVE_KIT_API, LIVE_KIT_SEC_KEY);

  if (req.method === 'POST') {
    const jsondData    = JSON.parse(req.bodyRaw);
    const VideoLibraryId    = jsondData.VideoLibraryId;
    const VideoGuid         = jsondData.VideoGuid;
    const Status            = jsondData.Status;

    // Event is a WebhookEvent object
    const event = await receiver.receive(req.body, req.get('Authorization'));
    log(`Events ${event}`);

  }

  return res.send({method: 'method is POST'});
};