code: def allow_unconfirmed_email(view_function):
      
      @wraps(view_function)    # Tells debuggers that is is a function wrapper
      def decorator(*args, **kwargs):
          # Sets a boolean on the global request context
          g._flask_user_allow_unconfirmed_email = True
  
          # Catch exceptions to properly unset boolean on exceptions
          try:
              user_manager = current_app.user_manager
  
              # User must be logged in with a confirmed email address
              allowed = _is_logged_in_with_confirmed_email(user_manager)
              if not allowed:
                  # Redirect to unauthenticated page
                  return user_manager.unauthenticated_view()
  
              # It's OK to call the view
              return view_function(*args, **kwargs)
  
          finally:
              # Allways unset the boolean, whether exceptions occurred or not
              g._flask_user_allow_unconfirmed_email = False
  
      return decorator
docs: This decorator ensures that the user is logged in,
      but allows users with or without a confirmed email addresses
      to access this particular view.
  
      It works in tandem with the ``USER_ALLOW_LOGIN_WITHOUT_CONFIRMED_EMAIL=True`` setting.
  
      .. caution::
  
          | Use ``USER_ALLOW_LOGIN_WITHOUT_CONFIRMED_EMAIL=True`` and
              ``@allow_unconfirmed_email`` with caution,
              as they relax security requirements.
          | Make sure that decorated views **never call other views directly**.
              Allways use ``redirect()`` to ensure proper view protection.
  
  
      Example::
  
          @route('/show_promotion')
          @allow_unconfirmed_emails
          def show_promotion():   # Logged in, with or without
              ...                 # confirmed email address
  
      It can also precede the ``@roles_required`` and ``@roles_accepted`` view decorators::
  
          @route('/show_promotion')
          @allow_unconfirmed_emails
          @roles_required('Visitor')
          def show_promotion():   # Logged in, with or without
              ...                 # confirmed email address
  
      | Calls unauthorized_view() when the user is not logged in.
      | Calls the decorated view otherwise.