docs: def verified_email_required(function=None,
                              login_url=None,
                              redirect_field_name=REDIRECT_FIELD_NAME):
      """
      Even when email verification is not mandatory during signup, there
      may be circumstances during which you really want to prevent
      unverified users to proceed. This decorator ensures the user is
      authenticated and has a verified email address. If the former is
      not the case then the behavior is identical to that of the
      standard `login_required` decorator. If the latter does not hold,
      email verification mails are automatically resend and the user is
      presented with a page informing them they needs to verify their email
      address.
      """
      def decorator(view_func):
          @login_required(redirect_field_name=redirect_field_name,
                          login_url=login_url)
          def _wrapped_view(request, *args, **kwargs):
              if not EmailAddress.objects.filter(user=request.user,
                                                 verified=True).exists():
                  send_email_confirmation(request, request.user)
                  return render(request,
                                'account/verified_email_required.html')
              return view_func(request, *args, **kwargs)
          return _wrapped_view
  
      if function:
          return decorator(function)
      return decorator