homogenization of signal connection

accounts/apps.py

@@ -7,4 +7,3 @@ class AccountsConfig(AppConfig):
 
     def ready(self):
         import accounts.signals  # noqa
-        post_migrate.connect(accounts.signals.create_default_options, sender=self)

accounts/signals.py

@@ -2,13 +2,14 @@ from django.contrib import messages
 from django.contrib.auth.models import User
 from django.contrib.auth.signals import user_logged_in, user_logged_out
 from django.contrib.sites.shortcuts import get_current_site
-from django.db.models.signals import post_save
+from django.db.models.signals import post_migrate, post_save
 from django.dispatch import receiver
 from django.utils.translation import ugettext_lazy as _
 
 from .models import Connector, Participation, Profile, Transport
 
 
+@receiver(post_migrate)
 def create_default_options(sender, **kwargs):
     Transport.objects.get_or_create(name='Train')
     Transport.objects.get_or_create(name='Plane')