exemplo 3.7 – service-recipe.html

	<!doctype html>
	<html ng-app="myApp">
	<body>
	  <div ng-controller="TwitterController">
	    <span>Token (by service): {{token}}</span>
	  </div>
	<script src="angular.min.js"></script>
	<script type="text/javascript">
	var app = angular.module('myApp',[]);
	
	app.value('$twitterApiToken','YTEyMzQ1NjU0MzIxeA==');
	
	app.service('$TwitterTokenService',['$twitterApiToken',TwitterTokenService]); // declaração por meio de service()

	// Construtor - TwitterTokenService function
	functionTwitterTokenService(token){
	  this.getToken =function(){
	    	return token;
	  }
	}

	app.controller('TwitterController',['$scope','$TwitterTokenService',function($scope, $TwitterTokenService){
	  $scope.token = $TwitterTokenService.getToken();
	}]);
	</script>
	</body>
	</html>