I'm trying to identify the user who is making Twilio requests from my system. Is there a way I can encrypt the information of this user, send it to Twilio along with the allowed parameters & receive the same along with Twilio's response?
EDIT: I may not have been very clear. I'm trying to make calls using Twilio's API from a web-app (PHP). I need to send the user (who is trying to establish the call)'s details & our API key to Twilio so that I can identify the user when I receive the response from Twilio.