code: def check_connection(self) -> DBHandlerStatus:
      try:
          self.client.api_test()
      except SlackApiError as e:
          assert e.response["ok"] is False
          return False
      return True
  
file_path: evadb/evadb/third_party/databases/slack/slack_handler.py
imports: import pandas
  from slack_sdk import WebClient
  from slack_sdk.errors import SlackApiError
  from evadb.third_party.types import DBHandler, DBHandlerResponse, DBHandlerStatus
label_desc: Use image node_id 4 for calling the SlackHandler obj's underlying member method code with example usage: obj.check_connection() and returns: True, False