curl --request POST \
  --url https://app.alana.shopping/api/workspace/{workspaceId}/billing/checkout \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "plan": "standard",
  "billing_period": "monthly",
  "coupon_code": "<string>"
}
'

{
  "checkout_url": "<string>",
  "session_id": "<string>"
}