docstr: Checks the connection is active
code: def __init__(self, handler):
      """
      Checks the connection is active
      """
      super().__init__(handler)
      self.client = WebClient(
          token=self.handler.connection_args["token"]
      )
  
imports: import os
  from datetime import datetime, timezone
  import ast
  from typing import List
  import pandas
  from slack_sdk import WebClient
  from slack_sdk.errors import SlackApiError
  from slack_sdk.web.slack_response import SlackResponse
  from slack_sdk.socket_mode import SocketModeClient
  from slack_sdk.socket_mode.request import SocketModeRequest
  from slack_sdk.socket_mode.response import SocketModeResponse
  from mindsdb.interfaces.chatbot.types import ChatBotMessage
  from mindsdb.utilities import log
  from mindsdb.utilities.config import Config
  from mindsdb_sql.parser import ast
  from mindsdb_sql.parser.ast import ASTNode, Update, Delete
  from mindsdb_sql.planner.utils import query_traversal
  from mindsdb.integrations.libs.api_handler import APIChatHandler, APITable, FuncParser
  from mindsdb.integrations.utilities.sql_utils import extract_comparison_conditions
  from mindsdb.integrations.libs.response import HandlerStatusResponse, HandlerResponse, RESPONSE_TYPE
label_desc: Use image node_id 1 to create a new SlackChannelsTable object from inherited base classes: APITable with example: obj = SlackChannelsTable(handler)