Get customer by ID

curl --request GET \
  --url https://api.auctionnow.io/api/alpha/merchant/customers/{customerId} \
  --header 'Authorization: <authorization>'

{
  "data": {
    "_id": "<string>",
    "_creationTime": 123,
    "email": "<string>",
    "name": "<string>",
    "userId": "<string>",
    "stripeCustomerId": "<string>"
  },
  "timestamp": 123,
  "message": "<string>"
}