Startup services
You can define a service that will run some login on application startup stage.
Simply implement IStartUp
interface:
#[Singleton]
class Localization implements IStartUp
{
 private array $resources = /* @jsobject */ [];

 public function __construct(private HttpClient $http)
 {
 }

 // execute the action on application start up
 public function setUp()
 {
 $this->http->get("/api/locale-resource/1")
 ->then(function ($resources) {
 $this->resources = $resources;
 }, function () {
 // error
 });
 }
You can use to set up some cache, configuration, localization resources, to log some information, etc.