curl --request GET \
  --url https://api.callab.ai/v1/contact \
  --header 'Authorization: Bearer <token>'

{
  "status": "ok",
  "message": "<string>",
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "company_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "firstname": "<string>",
      "lastname": "<string>",
      "phone_number": "<string>",
      "metadata": {},
      "number_country_code": "<string>",
      "last_call_status": "<string>",
      "last_call_at": "2023-11-07T05:31:56Z",
      "last_call_duration": 123,
      "last_call_feedback": "<string>",
      "source_name": "<string>",
      "tag_name": "<string>",
      "category_name": "<string>",
      "notes": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "campaign_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "status": "<string>",
      "workspace_id": "<string>"
    }
  ]
}