Get single Parking User

curl --request GET \
  --url https://partner.staging.ezprk.dev/billing-accounts/{baId}/parking-users/{puId} \
  --header 'Authorization: Bearer <token>'

{
  "id": 123,
  "firstName": "<string>",
  "lastName": "<string>",
  "email": "<string>",
  "costCenter": "<string>",
  "phoneNumber": "<string>",
  "cars": [
    {
      "countryCode": "<string>",
      "licenseNumber": "<string>"
    }
  ],
  "address": {
    "countryCode": "<string>",
    "city": "<string>",
    "street": "<string>",
    "postalCode": "<string>",
    "co": "<string>"
  }
}