How to use the slackclient.util.SearchDict function in slackclient

def __init__(self, token=None, connect=True, proxies=None, **kwargs):
        # Slack app configs
        self.token = token

        # api configs
        self.proxies = proxies

        # HTTP Request handler
        self.api_requester = SlackRequest(proxies=proxies)

        # Workspace metadata
        self.username = None
        self.domain = None
        self.login_data = None
        self.users = SearchDict()
        self.channels = SearchList()

        # RTM configs
        self.websocket = None
        self.ws_url = None
        self.connected = False
        self.auto_reconnect = False
        self.last_connected_at = 0
        self.reconnect_count = 0
        self.rtm_connect_retries = 0

        # Connect to RTM on load
        if connect:
            self.rtm_connect()

def __init__(self, token, connect=True, proxies=None):
        self.token = token
        self.username = None
        self.domain = None
        self.login_data = None
        self.websocket = None
        self.users = SearchDict()
        self.channels = SearchList()
        self.connected = False
        self.ws_url = None
        self.proxies = proxies
        self.api_requester = SlackRequest(proxies=proxies)

        if connect:
            self.rtm_connect()