ember.js error on store.push

I'm pretty new to Ember and I am having an issue pushing data to the store.

contact.js:model

import DS from 'ember-data';

export default DS.Model.extend({
 //id: DS.attr(),
 FirstName: DS.attr(),
 Surname: DS.attr(),
 EmailAddress: DS.attr()
});

index.js:route

import Ember from 'ember';

var contactresult = {};
var store = {};

export default Ember.Route.extend({
model(){
var headers = new Headers({
"Content-Type": "application/json",
});

var config = { method: 'GET',headers: headers};

contactresult = fetch('http://localhost:9000/api/Contact/GetAllUsers')
.then(function(response) {
//this.store.pushPayload(response);
return response.json();
});
store = this.store;


return contactresult;

}
,setupController(controller,model){
model.forEach(function(item, index, enumerable){
store.push(store.normalize('contact', item));
// {
//   contacts:{
//   id: item.Id,
//   FirstName: item.FirstName,
//   Surname: item.Surname,
//   EmailAddress: item.EmailAddress
// }
// })
});

controller.set('model',model);
}
});

app.js

import Ember from 'ember';
import Resolver from 'ember/resolver';
import loadInitializers from 'ember/load-initializers';
import config from './config/environment';
import DS from 'ember-data';

let App;

Ember.MODEL_FACTORY_INJECTIONS = true;

App = Ember.Application.extend({
modulePrefix: config.modulePrefix,
podModulePrefix: config.podModulePrefix,
Resolver
});

loadInitializers(App, config.modulePrefix);

App.ContactSerializer = DS.RESTSerializer.extend({
normalizeFindAllResponse: function(store, primaryModelClass, payload, id, 
requestType){
payload = {contacts: payload};
return this._super(store, primaryModelClass, payload, id, requestType);
},
normalizeFindRecordResponse: function(store, primaryModelClass, payload, id,   requestType){
payload ={contact: payload} ;
return this._super(store, primaryModelClass, payload, id, requestType);
},
serializeIntoHash: function(hash,type, snapshot,option){
  option = "";
    var json = this.serialize(snapshot, {included:true});

    Object.keys(json).forEach(function(key){
        hash[key] = json[key];
    });
}
});

export default App;

The error message I get back is: Error while processing route: index Cannot read property 'replace' of undefined TypeError: Cannot read property 'replace' of undefined

I can't seem to get around it, does anyone have any suggestions?