diff --git a/pretix_keycloak_create_user/forms.py b/pretix_keycloak_create_user/forms.py
index edd5016ff743db859fc094159967b2a07f189b09..1f0261127fa8f39d03dcd59a31dbb97c83268dae 100644
--- a/pretix_keycloak_create_user/forms.py
+++ b/pretix_keycloak_create_user/forms.py
@@ -1,8 +1,4 @@
-from django.forms import (
-    CharField,
-    CheckboxSelectMultiple,
-    MultipleChoiceField,
-)
+from django.forms import CharField, CheckboxSelectMultiple, MultipleChoiceField
 from django.utils.translation import ugettext_lazy as _
 from i18nfield.forms import I18nFormField, I18nTextInput
 from pretix.base.forms import SettingsForm
@@ -19,9 +15,7 @@ class KeycloakCreatorForm(SettingsForm):
     keycloak_create_user_authorization_token = CharField(
         label=_("Access token"),
         strip=True,
-        help_text=_(
-            "Access token for the keycloak server. "
-        ),
+        help_text=_("Access token for the keycloak server. "),
     )
     keycloak_create_user_realm_url = CharField(
         label=_("Keycloak realm url"),
@@ -32,9 +26,7 @@ class KeycloakCreatorForm(SettingsForm):
         widget=I18nTextInput,
         label=_("Username field help text"),
         required=True,
-        help_text=_(
-            "Explains what to enter"
-        ),
+        help_text=_("Explains what to enter"),
     )
 
     def __init__(self, *args, **kwargs):
diff --git a/pretix_keycloak_create_user/signals.py b/pretix_keycloak_create_user/signals.py
index d8e1e9e98c5139a1a2067e969e439c64b3d80b50..05833bdd8fae7757aba1aa5dfae9ac861c3bea73 100644
--- a/pretix_keycloak_create_user/signals.py
+++ b/pretix_keycloak_create_user/signals.py
@@ -5,17 +5,12 @@ from django.dispatch import receiver
 from django.urls import resolve, reverse
 from django.utils.translation import gettext_noop, ugettext_lazy as _
 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_placed, 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
-from pretix.base.services.orders import OrderError
-
 
 from .tasks import keycloak_create_user
 
@@ -24,9 +19,7 @@ settings_hierarkey.add_default("keycloak_create_user_authorization_token", "", s
 settings_hierarkey.add_default("keycloak_create_user_realm_url", "", str)
 settings_hierarkey.add_default(
     "keycloak_create_user_hint",
-    LazyI18nString.from_gettext(
-        gettext_noop("Your keycloak user will be created.")
-    ),
+    LazyI18nString.from_gettext(gettext_noop("Your keycloak user will be created.")),
     LazyI18nString,
 )
 settings_hierarkey.add_default(
@@ -53,9 +46,7 @@ def add_keycloak_username_question(sender, position, **kwargs):
             required=False,
             regex="[a-z0-9._=/-]+",
             strip=True,
-            error_messages={
-                "invalid": _("Enter a valid username")
-            },
+            error_messages={"invalid": _("Enter a valid username")},
             help_text=rich_text_snippet(sender.settings.keycloak_create_user_hint),
         )
     }
@@ -81,16 +72,13 @@ def keycloak_create_user_create_async(sender, order, **kwargs):
         ):
             continue
 
-        keycloak_create_user.apply_async(
-                args=(
-                    sender.pk,
-                    order.pk,
-                    order_position.pk
-                )
-            )
+        keycloak_create_user.apply_async(args=(sender.pk, order.pk, order_position.pk))
 
 
-@receiver(nav_event_settings, dispatch_uid="keycloak_create_user_keycloak_username_nav_settings")
+@receiver(
+    nav_event_settings,
+    dispatch_uid="keycloak_create_user_keycloak_username_nav_settings",
+)
 def navbar_settings(sender, request=None, **kwargs):
     url = resolve(request.path_info)
     return [
@@ -108,6 +96,7 @@ def navbar_settings(sender, request=None, **kwargs):
         }
     ]
 
+
 @receiver(validate_order, dispatch_uid="keycloak_create_user_validate_order")
 def validate_order(sender, positions, **kwargs):
     if (
@@ -115,7 +104,7 @@ def validate_order(sender, positions, **kwargs):
         and not sender.settings.keycloak_create_user_realm_url
     ):
         return
-    
+
     for order_position in positions.all():
         if str(order_position.item.pk) not in sender.settings.get(
             "keycloak_create_user_items"
@@ -127,7 +116,7 @@ def validate_order(sender, positions, **kwargs):
         ):
             continue
 
-        event = sender 
+        event = sender
         server = event.settings.keycloak_create_user_realm_url
         token = event.settings.keycloak_create_user_authorization_token
 
@@ -137,17 +126,13 @@ def validate_order(sender, positions, **kwargs):
 
         response = requests.get(
             "{}/users/count?username={}".format(
-                server,
-                username # TODO verify that this is not a security issue
+                server, username  # TODO verify that this is not a security issue
             ),
             headers={
                 "Authorization": "Bearer {}".format(token),
             },
         )
-    
+
         if response.status_code == 200:
             if json.loads(response.text) > 0:
-                raise OrderError(
-                    _("Username already taken")
-                )
-    
+                raise OrderError(_("Username already taken"))
diff --git a/pretix_keycloak_create_user/tasks.py b/pretix_keycloak_create_user/tasks.py
index deb8a20688eb18b0ba73cebf9f93574cfde10ec5..e6c3932bbf34cd8bd97d742edc918e9f48cd3b0c 100644
--- a/pretix_keycloak_create_user/tasks.py
+++ b/pretix_keycloak_create_user/tasks.py
@@ -15,12 +15,7 @@ logger = logging.getLogger(__name__)
     retry_backoff=True,
     retry_backoff_max=3600,
 )
-def keycloak_create_user(
-    self,
-    event: int,
-    order: int,
-    order_position: int
-):
+def keycloak_create_user(self, event: int, order: int, order_position: int):
     order_position = OrderPosition.objects.get(pk=order_position)
 
     username = order_position.meta_info_data.get("question_form_data", {}).get(
@@ -33,13 +28,15 @@ def keycloak_create_user(
     order = Order.objects.get(pk=order)
     server = event.settings.keycloak_create_user_realm_url
     token = event.settings.keycloak_create_user_authorization_token
-    payload = {"username": username, "email": order_position.order.email, "enabled": True}
+    payload = {
+        "username": username,
+        "email": order_position.order.email,
+        "enabled": True,
+    }
 
     try:
         r = requests.post(
-            "{}/users".format(
-                server
-            ),
+            "{}/users".format(server),
             headers={
                 "Authorization": "Bearer {}".format(token),
             },