diff --git a/public/index.php b/public/index.php
index 54c1103..e78336b 100644
--- a/public/index.php
+++ b/public/index.php
@@ -10,8 +10,8 @@
             $user = new \stdClass;
             $user->email = $_POST['login_email'];
             $user->password = $_POST['login_password'];
-            $logged = new \App\Service\User\Login($user);
-            var_dump($logged); //test retrieve
+            $loginRequest = new \App\Service\User\Login();
+            var_dump($loginRequest->login($user)); //test retrieve
         } catch (Exception $ex) {
             echo '<script language="javascript">alert("ERROR: ' . $ex->getMessage() . '")</script>';
         }
diff --git a/src/Entity/User.php b/src/Entity/User.php
index f1a5a13..73edf9b 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -6,7 +6,7 @@
 
 final class User
 {
-    /** @var int $id */
+    /** @var string $id */
     private $id;
 
     /** @var string $name */
@@ -24,7 +24,7 @@ final class User
     /** @var string|null $updatedAt */
     private $updatedAt;
 
-    public function getId(): int
+    public function getId(): string
     {
         return $this->id;
     }
diff --git a/src/Service/User/Login.php b/src/Service/User/Login.php
index 5b73762..7532a29 100644
--- a/src/Service/User/Login.php
+++ b/src/Service/User/Login.php
@@ -9,7 +9,7 @@
 
 final class Login extends Base
 {
-    public function login(object $entity): User
+    public function login(object $entity): object
     {
         if (empty($entity->email)) {
             throw new UserException('El campo "correo electrónico" es obligatorio.', 400);