fix: plainPassword validator needs validationContext (#1713)

Author: PawelSuwinski

core/user.md

@@ -33,7 +33,7 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[ApiResource(
     operations: [
         new GetCollection(),
-        new Post(processor: UserPasswordHasher::class),
+        new Post(processor: UserPasswordHasher::class, validationContext: ['groups' => ['user:create']]),
         new Get(),
         new Put(processor: UserPasswordHasher::class),
         new Patch(processor: UserPasswordHasher::class),