old_contents: class LoggerRouter(object):
  
      logger_apps = ['data_finder', 'auth', 'authtoken']
  
      def db_for_read(self, model, **hints):
          if model._meta.app_label in self.logger_apps:
              return 'logger'
          return None
  
      def db_for_write(self, model, **hints):
          if model._meta.app_label in self.logger_apps:
              return 'logger'
          return None
  
      def allow_relation(self, obj1, obj2, **hints):
          if obj1._meta.app_label == 'councils' or \
             obj2._meta.app_label == 'councils':
             return True
          return None
  
      def allow_migrate(self, db, app_label, model_name=None, **hints):
          if app_label in self.logger_apps:
              return db == 'logger'
          return None
  
new_contents: class LoggerRouter(object):
  
      logger_apps = ['data_finder', 'admin', 'auth', 'authtoken']
  
      def db_for_read(self, model, **hints):
          if model._meta.app_label in self.logger_apps:
              return 'logger'
          return None
  
      def db_for_write(self, model, **hints):
          if model._meta.app_label in self.logger_apps:
              return 'logger'
          return None
  
      def allow_relation(self, obj1, obj2, **hints):
          if obj1._meta.app_label == 'councils' or \
             obj2._meta.app_label == 'councils':
             return True
          return None
  
      def allow_migrate(self, db, app_label, model_name=None, **hints):
          if app_label in self.logger_apps:
              return db == 'logger'
          return None
  
subject: apply auth and admin migrations using the same DB connection