curl --request POST \
  --url https://api.telli.com/v1/get-contacts-batch \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "contact_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}'

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