Clone the Repo to your prefered directory.
On your terrminal, run cd Twilio-30-Secs-Blog then
run composer install to install project dependancies.
Create .env file and add the following keys after obtaining the relevant values from your twilio dashboard
TWILIO_SID=your_twilio_sid
TWILIO_TOKEN=your_twilio_token
Activate your WhatsApp Sandbox
Run php twilioWhatsAppMessaging.php
Voila! We have sent out first WhatsApp message!.