An Angular (1.0) service written in TypeScript

login.service.ts

/// <reference path="../../typings/angularjs/angular.d.ts" />
/// <reference path="../../typings/angularjs/angular-route.d.ts" />

module TMA {
	
	interface ILoginService {
		authenticate(username: string, password: string) : ng.IPromise<ng.IHttpPromiseCallbackArg<User>>;
	}
	
	export class LoginService implements ILoginService {
		
		static $inject = ["$http", "$q"];
		constructor(private $http: ng.IHttpService, private $q: ng.IQService) {
			
		}
		
		authenticate(username: string, password: string) : ng.IPromise<ng.IHttpPromiseCallbackArg<User>> {
			var defer = this.$q.defer();
			this.$http({
				method: "POST",
				url: "http://www.trackmyassets.biz/api/users/authenticate/",
				data: {
					email: username,
					password: password
				}
			}).success((data: any, status: number, header: ng.IHttpHeadersGetter, config: ng.IRequestConfig) => {
				var u = new User(data.user);
				defer.resolve(u);
			})
			return defer.promise;
		}
	}
	
	angular
		.module("TMA")
		.service("LoginService", LoginService);
}