1- Open your Twilio Account here
2- Click on Messaging → Try it out → Send a WhatsApp message
3- Copy the phone number as in the below image
4- Paste the phone number in WhatsApp Configuration as below
1- If you have a subscription with Twilio, you can find your number under WhatsApp Senders
2- Scroll down to the number you'd like yo use
3- Copy the WhatsApp Sender number and paste it into Twilio
