Unarchives a channel.

        Args:
            channel (str): The channel id. e.g. 'C1234567890'

def channels_unarchive(self, *, channel: str, **kwargs) -> SlackResponse:
        """Unarchives a channel.

        Args:
            channel (str): The channel id. e.g. 'C1234567890'
        """
        self._validate_xoxp_token()
        kwargs.update({"channel": channel})
        return self.api_call("channels.unarchive", json=kwargs)