code: def login_required(func):
      
      if inspect.isclass(func):
          apply_function_to_members(func, login_required)
          return func
      else:
          @functools.wraps(func)
          def decorated_view(*args, **kwargs):
              if "login_not_required" not in utils.get_decorators_list(func) \
                      and not_authenticated():
                  return login_manager.unauthorized()
              return func(*args, **kwargs)
  
          return decorated_view
docs: A wrapper around the flask_login.login_required.
      But it also checks the presence of the decorator: @login_not_required
      On a "@login_required" class, method containing "@login_not_required" will
      still be able to access without authentication
      :param func:
      :return: