title: Securing the rest endpoint exposed to twilio for incoming message
body: <p>In my application, I am exposing a rest endpoint and configured it in twilio account for the incoming message.
  Now since the request is not coming from a logged in user but from an external customer, there is no token sent in the request and so the exposed API is not secure.</p>
  <p>Is there a way I can make it secure apart from making it a https call?</p>