ReferenceError: Twilio is not defined

[mhadad]

/node_modules/@twilio-labs/plugin-rtc/src/serverless/functions/token.js:4
const AccessToken = Twilio.jwt.AccessToken;
^
ReferenceError: Twilio is not defined

The above is what I'm getting for the following lines:
import * as Twilio from 'twilio';
import * as TwilioToken from '@twilio-labs/plugin-rtc/src/serverless/functions/token';

dotenv.config();
const tokenFunction: ServerlessFunction = TwilioToken.handler;
so how can I fix this?
Thanks