    settings=self.settings,
                default=self.default_callback_options,
            )
        )

    # ----------------------
    # Internal methods for Callback

    def run_installation(self, code: str) -&gt; Optional[Installation]:
        try:
            oauth_response: SlackResponse = self.client.oauth_v2_access(
                code=code,
                client_id=self.settings.client_id,
                client_secret=self.settings.client_secret,
                redirect_uri=self.settings.