Twilio Whatsapp dialogflow

Example showing how to integrate, dialogflow with twilio. For a complete tutorial read this medium article.

Setup

Create dialogflow es agent.
Create intent for dialogflow agent with name 'Emi Due', action 'emi.due-date', and few training pharses like 'when is my next emi?'. 'when is my next installment?' etc.
Create google cloud service account, and download credentials.json
Create twilio project
Enable whatsapp sandbox for twilio (Dashboard > Programmable Messages > Try It Out > Try Whatsapp).
Join twilio whatsapp sandbox by whatsapp message 'join sandbox-name' to twilio whatsapp sandbox phone number.
Create .env file
Copy content of .env-example to .env
Set value of TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN, GOOGLE_APPLICATION_CREDENTIALS in .env file

npm install
node ./index.js

ngrok http 3000

From your twilio project set whatsapp message callback url to ngrok_url/whatsapp.