code: def send_reminder(self, user, sender=None, **kwargs):
          
          if user.is_active:
              return False
          token = RegistrationTokenGenerator().make_token(user)
          kwargs.update({"token": token})
          self.email_message(
              user, self.reminder_subject, self.reminder_body, sender, **kwargs
          ).send()
docs: Sends a reminder email to the specified user