curl --request POST \
  --url https://api.crevio.co/v1/calls \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "to_number": "<string>",
  "objective": "<string>",
  "first_message": "<string>",
  "purpose": "<string>"
}
'

{
  "id": "<string>",
  "object": "<string>",
  "to_number": "<string>",
  "from_number": "<string>",
  "objective": "<string>",
  "summary": "<string>",
  "transcript": "<string>",
  "recording_url": "<string>",
  "ended_reason": "<string>",
  "duration_seconds": 123,
  "credits_charged": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "customer": "<string>"
}