text: import sys
  from django.contrib.auth import get_user_model
  from django.contrib.auth.hashers import make_password
  from django.apps import AppConfig
  
  
  class MqttManagerConfig(AppConfig):
      name = 'mqtt_manager'
      verbose_name = 'mqtt manager'
  
      USERNAME_DATA_RECORDER = 'mqtt_data_recorder'
  
      def ready(self):
          if not ('makemigrations' in sys.argv or 'migrate' in sys.argv):
              UserModel = get_user_model()
              if not UserModel.objects.filter(username=self.USERNAME_DATA_RECORDER).exists():
                  user = UserModel(username=self.USERNAME_DATA_RECORDER, password=make_password(None))
                  user.save()
  