curl --request GET \
  --url http://localhost:3001/api/v1/business/customers/{customerId} \
  --header 'x-api-key: <x-api-key>'

{
  "success": true,
  "data": {
    "customerId": "<string>",
    "email": "<string>",
    "paymentMethods": [
      {
        "id": "<string>",
        "brand": "<string>",
        "last4": "<string>",
        "expiryMonth": 123,
        "expiryYear": 123
      }
    ],
    "recentPayments": [
      {}
    ],
    "userId": "<string>",
    "firstName": {},
    "lastName": {},
    "phoneNumber": {},
    "defaultPaymentMethod": {}
  }
}