> [!NOTE] > This repository is provided as a preview version. While we offer it for experimental purposes, please be aware that it may not include complete functionality or comprehensive support. 1. **push_text_message** - Push a simple text message to a user via LINE. - **Inputs:** - `userId` (string?): The user ID to receive a message. Defaults to DESTINATION_USER_ID. Either `userId` or `DESTINATION_USER_ID` must be set.