Setting up Environment Variables cd api/ touch .env Add the following to .env TWILIO_ACCOUNT_SID=<XXX> TWILIO_API_KEY_SID=<XXX> TWILIO_API_KEY_SECRET=<XXX> TWILIO_AUTH_TOKEN=<XXX> TWILIO_PHONE_NUMBER=<XXX> Sample API requests with curl curl -i -H "Content-Type: application/json" http://localhost:5000/api/v1/contacts -H "user_id: 0" # Get Contacts curl -i -H "Content-Type: application/json" http://localhost:5000/api/v1/contact -H "user_id: 0" -X POST -d '{"friend_user_name": "saif1"}' # POST Contact (add contact) curl -i -H "Content-Type: application/json" http://localhost:5000/api/v1/contact -H "user_id: 0" -X DELETE -d '{"friend_user_name": "saif1"}' # DELETE Contact