serialize unconventional JSON with Ember-data

my api api/customers return:

{
    "value": [
        {
        "CustomerID": "ALFKI",
        "CompanyName": "Alfreds Futterkiste",
        "ContactName": "Maria Anders",
        "ContactTitle": "Sales Representative",
        "id": "b0d16ed0-c901-4ca3-ba41-7fc74c96909f"
    },
    {
        "CustomerID": "ANATR",
        "CompanyName": "Ana Trujillo Emparedados y helados",
        "ContactName": "Ana Trujillo",
        "ContactTitle": "Owner",
        "id": "3f8ac226-9f78-42df-b337-0505f69792c3"
    },
    {
        "CustomerID": "ANTON",
        "CompanyName": "Antonio Moreno Taquería",
        "ContactName": "Antonio Moreno",
        "ContactTitle": "Owner",
        "id": "09d31df6-69f4-43e4-9cc6-7faa5b8b5e3b"
    }]
}

but ember(/customers) should expects:

{
    "customers": [
        {
        "CustomerID": "ALFKI",
        "CompanyName": "Alfreds Futterkiste",
        "ContactName": "Maria Anders",
        "ContactTitle": "Sales Representative",
        "id": "b0d16ed0-c901-4ca3-ba41-7fc74c96909f"
    },
    {
        "CustomerID": "ANATR",
        "CompanyName": "Ana Trujillo Emparedados y helados",
        "ContactName": "Ana Trujillo",
        "ContactTitle": "Owner",
        "id": "3f8ac226-9f78-42df-b337-0505f69792c3"
    },
    {
        "CustomerID": "ANTON",
        "CompanyName": "Antonio Moreno Taquería",
        "ContactName": "Antonio Moreno",
        "ContactTitle": "Owner",
        "id": "09d31df6-69f4-43e4-9cc6-7faa5b8b5e3b"
    }]
}

I find this answer: GET unconventional JSON with Ember-data

so I try(in my app/serializers/customers.js):

export default DS.RESTSerializer.extend({
  extractArray: function(store, type, payload, id) {
    var newpayload = { customers: payload.value };
    return this._super(store, type, newpayload, id);
  },
});

and in the templates/customers.hbs:

{{#each}}
    {{CustomerID}}({{ContactName}}
{{/each}}

I open the browser, but it's empty, and no error message, so why it doesn't work?