curl --request GET \
  --url https://api.telli.com/v1/get-contact/{contactId} \
  --header 'Authorization: <api-key>'

{
  "contact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "external_contact_id": "<string>",
  "external_url": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "gender": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "phone_number": "<string>",
  "in_call_since": "2023-11-07T05:31:56Z",
  "reached_at": "2023-11-07T05:31:56Z",
  "contact_details": {},
  "call_attempts": 123,
  "next_call_at": "2023-11-07T05:31:56Z",
  "email": "[email protected]",
  "timezone": "<string>",
  "salutation": "<string>",
  "status": "reached"
}