curl --request GET \
  --url https://vpos-sandbox.payven.com.tr/api/v1/checkout/sessions/{session_id}

{
  "session_id": "<string>",
  "tenant_id": "<string>",
  "merchant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "external_merchant_id": "<string>",
  "merchant_name": "<string>",
  "amount": 123,
  "currency": "<string>",
  "allowed_installments": [
    123
  ],
  "description": "<string>",
  "external_id": "<string>",
  "basket_id": "<string>",
  "customer_email": "<string>",
  "customer_phone": "<string>",
  "metadata": {},
  "status": "<string>",
  "transaction_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "2023-11-07T05:31:56Z",
  "expires_at": "2023-11-07T05:31:56Z",
  "allow_pre_auth": true,
  "is_test_session": true,
  "attempt_count": 123,
  "max_attempts": 123,
  "success_url": "<string>",
  "cancel_url": "<string>"
}