curl --request POST \
  --url https://demoapi.saasphereltd.com/api/v1/loans/settle \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "repayment_id": 456
}
'

{
  "status": "00",
  "message": "Loan settled successfully",
  "data": {}
}