Args:
    channel: Channel name (e.g., 'general') or channel ID
    text: Message text to send

Args:
    username: Username of the recipient
    text: Message text to send

Args:
    room_id: ID of the room containing the message
    msg_id: ID of the message to delete

Args:
    channel: Channel name, channel ID, or @username for DM
    file_path: Absolute path to the file to upload
    message: Optional text message to send with the file

Args:
    username: Username to get information about

Args:
    name: Name of the channel to create

Args:
    room_id: Room ID or room name of the channel/group/DM
    count: Number of messages to retrieve (default: 20, max: 100)
    offset: Skip this many newest messages — use to page back through history
            instead of re-reading with a larger count (e.g. offset=20 to get
            the 20 messages older than the first page)

Args:
    room_id: Room ID or room name of the channel/group/DM to search in
    query: Search keyword(s)
    count: Max results to return (default: 20, max: 100)

Args:
    message_id: The message ID (shown as 'id: xxx' in message listings)