public void Initialize()
{
_fakeAccountHelper = new FakeAccountHelper();
Guid validSessionId = _fakeAccountHelper.GenerateValidCredentials();
_endpointHelper = new EndpointHelper();
_endpointHelper.Setup()
.SetAuthenticationToken(validSessionId.ToString());
string responseContent = _endpointHelper.GetShoppingItems();
_getShoppingItemResponse = JsonConvert.DeserializeObject <GetShoppingResponse>(responseContent);
}