curl --request GET \
  --url https://api.sandbox.saalal.com/v1/card-users/{reference} \
  --header 'Authorization: Bearer <token>'

{
  "message": "OK",
  "statusCode": 200,
  "data": {
    "cardUser": {
      "reference": "83865f93-c204-499e-b133-401d3322b242",
      "first_name": "Testing",
      "last_name": "Boy",
      "address": "Pikine Texaco 11",
      "id_no": "1752199801163",
      "phone": "221796338816",
      "email": "testingboy@gmail.com",
      "status": null
    }
  }
}