curl --request GET \
  --url https://app.teable.ai/api/billing/subscription/license/%7BlicenseId%7D \
  --header 'Authorization: Bearer REPLACE_BEARER_TOKEN'

{
  "id": "<string>",
  "instanceId": "<string>",
  "currentPeriodStart": "<string>",
  "currentPeriodEnd": "<string>",
  "quantity": 123,
  "unitAmount": 123,
  "licenseKey": "<string>",
  "interval": "month",
  "level": "free"
}