How to display a hasMany association

I'm new to ember and I created a model like this :

# app/models/skill.js
export default DS.Model.extend({
  name: DS.attr('string'),
  description: DS.attr('string'),
  link: DS.attr('string'),
  user: DS.hasMany('user')
});

I have this route :

# app/routes/skill.js
import Ember from 'ember';

export default Ember.Route.extend({
  model: function(params) {
    return this.store.find('skill', params.id);
  }
});

This router :

# app/router.js
import Ember from 'ember';
import config from './config/environment';

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.resource('users', function() {
    this.route('index', { path: '/'} );
    this.route('signup');
  });
  this.resource('skills', function() {
    this.route('index', { path: '/' });
  });
  this.resource('skill', { path: '/skills/:id' });
});

export default Router;

And this template :

# app/templates/skill.hbs
{{#link-to 'skills.index'}}Back{{/link-to}}
{{model.name}}
{{model.description}}

{{#each user in model.user}}
  {{user.nickname}}
{{/each}}

I simply want to have a list of users with their nicknames. This is the response from my api :

{"skills":{"id":1,"name":"Ember","description":"JS Framework","link":"emberjs.com"},"users":[{"id":1,"email":null,"nickname":null,"bio":null,"created_at":"2015-06-21T10:40:34.555Z","updated_at":"2015-06-21T10:40:34.555Z"},{"id":2,"email":"test","nickname":"dougui","bio":"blabla","created_at":"2015-06-21T10:40:50.493Z","updated_at":"2015-06-21T10:40:50.493Z"},{"id":3,"email":null,"nickname":null,"bio":null,"created_at":"2015-06-21T20:51:29.546Z","updated_at":"2015-06-21T20:51:29.546Z"},{"id":4,"email":null,"nickname":null,"bio":null,"created_at":"2015-06-21T20:55:11.163Z","updated_at":"2015-06-21T20:55:11.163Z"},{"id":5,"email":null,"nickname":null,"bio":null,"created_at":"2015-06-21T20:55:51.231Z","updated_at":"2015-06-21T20:55:51.231Z"},{"id":6,"email":"email","nickname":"nickname","bio":null,"created_at":"2015-06-22T00:01:47.089Z","updated_at":"2015-06-22T00:01:47.089Z"}]}

There is all information about skill and users but nothing is shown.

Why my list is not rendered?

Thanks!