docs: def _init_login_manager(app_):
      """Initialise and configure the login manager."""
      login_manager = flogin.LoginManager()
      login_manager.setup_app(app_)
      login_manager.anonymous_user = Anonymous
      login_manager.login_view = "login"
  
      users = {app_.config['USERNAME']: User('Admin', 0)}
      names = dict((int(v.get_id()), k) for k, v in users.items())
  
      @login_manager.user_loader
      def load_user(userid):
          userid = int(userid)
          name = names.get(userid)
          return users.get(name)
  
      return users, names