Using generated Swagger TypeScript Rest Client in Angular2

I am working on a Meteor web application using Angular 2 and TypeScript. For using a REST API, I have generated client code with Swagger Codegen. Unfortunately there is no sample on GitHub, how to use the rest client.

I have an angular 2 view component which is injecting an Angular 2 service (ProductTreeService) and the generated API (both marked as "@Injectable"):

@Component({
    selector: 'panel-product-selection',
    template,
    providers: [ProductTreeService, UserApi],
    directives: [ProductTreeComponent]
})

export class PanelProductSelectionComponent
{
    private categoriesProductsTree: Collections.LinkedList<CategoryTreeElement>;
    private productTreeService: ProductTreeService;
    private userApi: UserApi;

    constructor(productTreeService: ProductTreeService, userApi: UserApi)
    {
        this.productTreeService = productTreeService;
        this.userApi = userApi;
    }

    ngOnInit(): void
    {
        //...
    }
}

While the angular service only is accessable and all is working fine, the application is crashing when I inject UserApi. The only difference between UserApi and ProductTreeService is the constructor: The service has no constructor parameters, the generated Api class has:

constructor(protected http: Http, @Optional()@Inject(BASE_PATH) basePath: string) {
    if (basePath) {
        this.basePath = basePath;
    }
}

So how can I inject the generated API?