code: def init(self):
          
          self.logged_in = False
  
          if self.login_type == self.LOGIN_TYPE_PASSWORDONLY:
              self.prompt_stage = self.PROMPT_STAGE_PASSWORD
          elif self.login_type == self.LOGIN_TYPE_NONE:
              self.prompt_stage = self.PROMPT_STAGE_CUSTOM
          else:
              self.prompt_stage = self.PROMPT_STAGE_USERNAME
  
          return self.banner + self._get_prompt()
docs: Init or reset the virtual device.
  
          :rtype:  str
          :return: The initial response of the virtual device.