curl --request POST \
  --url https://api-prod.blaaiz.com/api/external/virtual-bank-account/{id}/close \
  --header 'Content-Type: application/json' \
  --header 'x-blaaiz-api-key: <api-key>' \
  --data '
{
  "reason": "No longer needed"
}
'

{
  "message": "Virtual bank account closure initiated successfully",
  "account_id": "vba_123456789"
}