dont cast email to string, use new value method

tests/Unit/User/UseCases/AuthenticateUserTest.php

@@ -45,7 +45,7 @@ class AuthenticateUserTest extends TestCase
         ));
 
         $this->assertInstanceOf(User::class, $user);
-        $this->assertEquals('test@test.com', (string) $user->getEmail());
+        $this->assertEquals('test@test.com', $user->getEmail()->value());
     }
 
     public function test_throws_bad_request_when_email_null(): void