Switch to order_paid

As there is an issue with order_placed we might want to switch to order_paid.

pretix_keycloak_create_user/signals.py

@@ -7,7 +7,7 @@ from django.utils.translation import gettext_lazy, gettext_noop
 from i18nfield.strings import LazyI18nString
 from pretix.base.services.orders import OrderError
 from pretix.base.settings import settings_hierarkey
-from pretix.base.signals import order_modified, order_placed, validate_order
+from pretix.base.signals import order_modified, order_paid, validate_order
 from pretix.base.templatetags.rich_text import rich_text_snippet
 from pretix.control.signals import nav_event_settings
 from pretix.presale.signals import question_form_fields
@@ -52,7 +52,7 @@ def add_keycloak_username_question(sender, position, **kwargs):
     }
 
 
-@receiver(order_placed, dispatch_uid="keycloak_create_user_order_placed")
+@receiver(order_paid, dispatch_uid="keycloak_create_user_order_paid")
 @receiver(order_modified, dispatch_uid="keycloak_create_user_order_modified")
 def keycloak_create_user_create_async(sender, order, **kwargs):
     if (