curl --request GET \
  --url https://api.runflow.io/v1/flows/{flow_id}/inputs \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "flow_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "display_name": "<string>",
      "description": "<string>",
      "variable_type_code": "<string>",
      "validator_code": "<string>",
      "validator_attrs": {},
      "is_required": true,
      "default_value": {},
      "sort_order": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ],
  "first": "<string>",
  "next": "<string>",
  "previous": "<string>"
}