curl --request GET \
  --url https://api.onswitch.xyz/institution \
  --header 'x-service-key: <api-key>'

{
  "success": true,
  "message": "Institutions fetched successfully",
  "timestamp": "2024-01-01T00:00:00.000Z",
  "data": [
    {
      "code": "058",
      "name": "Guaranty Trust Bank",
      "country": "NG"
    },
    {
      "code": "011",
      "name": "First Bank of Nigeria",
      "country": "NG"
    }
  ]
}