curl --request POST \
  --url https://api.onswitch.xyz/institution/lookup \
  --header 'Content-Type: application/json' \
  --header 'x-service-key: <api-key>' \
  --data '
{
  "country": "NG",
  "bank_code": "058",
  "channel": "BANK"
}
'

{
  "success": true,
  "message": "Institution lookup successful",
  "timestamp": "2024-01-01T00:00:00.000Z",
  "data": {
    "code": "058",
    "name": "Guaranty Trust Bank",
    "country": "NG"
  }
}