curl --request GET \
  --url https://api-eu.flexportal.io/v1/customers/{customerId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Tenant-ID: <tenant-id>'

{
  "customerId": "<string>",
  "tenantId": "<string>",
  "email": "<string>",
  "firstName": "<string>",
  "lastName": "<string>",
  "customerType": "individual",
  "totalOrders": 123,
  "totalDevicesRented": 123,
  "totalMonthlyRevenue": 123,
  "status": "active",
  "orderIds": [
    "<string>"
  ],
  "rentalIds": [
    "<string>"
  ],
  "createdBy": "<string>",
  "company": "<string>",
  "phone": "<string>",
  "customFields": {},
  "lastBillingAddress": {
    "contactName": "<string>",
    "streetAddress": "<string>",
    "city": "<string>",
    "country": "<string>",
    "company": "<string>",
    "buildingInfo": "<string>",
    "locality": "<string>",
    "adminArea": "<string>",
    "postalCode": "<string>"
  },
  "lastShippingAddress": {
    "contactName": "<string>",
    "streetAddress": "<string>",
    "city": "<string>",
    "country": "<string>",
    "company": "<string>",
    "buildingInfo": "<string>",
    "locality": "<string>",
    "adminArea": "<string>",
    "postalCode": "<string>"
  },
  "createdAt": "<unknown>",
  "updatedAt": "<unknown>"
}