List all customers

{
  "ecomCustomers": [
    {
      "connectionid": "1",
      "externalid": "56789",
      "email": "[email protected]",
      "totalRevenue": "3280",
      "totalOrders": "2",
      "totalProducts": "2",
      "avgRevenuePerOrder": "2285",
      "avgProductCategory": "Electronics",
      "tstamp": "2017-02-06T14:05:31-06:00",
      "links": {
        "connection": "/api/3/ecomCustomers/1/connection",
        "orders": "/api/3/ecomCustomers/1/orders"
      },
      "id": "1",
      "connection": "1"
    },
    {
      "connectionid": "2",
      "externalid": "44322",
      "email": "[email protected]",
      "totalRevenue": "7599",
      "totalOrders": "1",
      "totalProducts": "1",
      "avgRevenuePerOrder": "7599",
      "avgProductCategory": "Books",
      "tstamp": "2016-12-13T18:02:07-06:00",
      "links": {
        "connection": "/api/3/ecomCustomers/3/connection",
        "orders": "/api/3/ecomCustomers/3/orders"
      },
      "id": "3",
      "connection": "2"
    },
    {
      "connectionid": "0",
      "externalid": "0",
      "email": "[email protected]",
      "totalRevenue": "10879",
      "totalOrders": "3",
      "totalProducts": "3",
      "avgRevenuePerOrder": "3626",
      "avgProductCategory": "Electronics",
      "tstamp": "2017-02-06T14:05:31-06:00",
      "links": {
        "connection": "/api/3/ecomCustomers/2/connection",
        "orders": "/api/3/ecomCustomers/2/orders"
      },
      "id": "2",
      "connection": null
    }
  ],
  "meta": {
    "total": "3"
  }
}