AuthenticationToken authenticationToken = AuthenticationService.Authenticate("user", "pass");

long projectId = 1123;
var  authenticationToken = AuthenticationService.Authenticate("myUsername", "myPassword");
var stories = new StoryService(authenticationToken).GetAllStories(projectId);

long projectId = 1123;
var story = new Story {
                      Name = "Nouvelle histoire",
                      RequestedBy = "pivotaltrackerdotnet",
                      StoryType = StoryType.Feature,
                      Description = "bla bla bla and more bla",
                      ProjectId = Constants.ProjectId,
                      Estimate = 2
                    };
                    
var authenticationToken = AuthenticationService.Authenticate("myUsername", "myPassword");
var storyService = new StoryService(authenticationToken);

var savedStory = storyService.AddNewStory(projectId,story);