Add a little command to create or update our superuser

The idea is to create a superuser via terraform and share it with SSM to
the cluster. That way we can make sure the user is always existing and
up-to-date with the parameter entry

app/access/management/commands/manage_superuser.py

@@ -0,0 +1,39 @@
+from typing import Any
+from utils.command import CustomBaseCommand, CommandHandler
+from django.contrib.auth.models import User
+
+import environ
+
+env = environ.Env()
+
+
+class Handler(CommandHandler):
+    """Create or update superuser from information from the environment
+
+    This command is used to make sure that the superuser is created and
+    configured. The data for it will be created centrally in terraform.
+    This will help with the password rotation.
+    """
+
+    def run(self) -> None:
+        username = env.str('DJANGO_SUPERUSER_USERNAME')
+        email = env.str('DJANGO_SUPERUSER_EMAIL')
+        password = env.str('DJANGO_SUPERUSER_PASSWORD')
+
+        try:
+            admin = User.objects.get(username=username)
+            operation = 'Updated'
+        except User.DoesNotExist:
+            admin = User.objects.create(username=username, email=email)
+            operation = 'Created'
+
+        admin.set_password(password)
+        admin.save()
+        self.print_success('%s the superuser %s', operation, username)
+
+
+class Command(CustomBaseCommand):
+    help = "Superuser management (creating or updating)"
+
+    def handle(self, *args: Any, **options: Any) -> None:
+        Handler(self, options).run()