Creates a call webhook. Wavix sends POST callbacks for on-call and post-call events.
Bearer token using appid (Authorization: Bearer
Webhook configuration.
Webhook URL to send call events to.
"https://you-site.com/webhook"
Allowed values: on-call, post-call.
on-call: Sends real-time status updates
when a call starts, is answered, and ends.
post-call: Sends a callback after the call ends
with disposition, duration, and cost.
post-call, on-call