Return details of a customer.
{- "ConsumerCustomer": {
- "customerId": "cust_Zv9NycMUtVSrz92x",
- "merchantId": "mcht_Zv9NycMUtVSrz92w",
- "marketplaceId": "mktp_Zv9NycMUtVSrz925",
- "referenceCustomerId": "CUST-48822821",
- "emailAddress": "lucy.diamond@star.com",
- "givenName": "string",
- "middleName": "string",
- "familyName": "string",
- "isVerified": true,
- "phoneNumber": "+61401234567",
- "createdAt": "2019-08-24T14:15:22Z",
- "updatedAt": "2019-08-24T14:15:22Z"
}
}