function standup() {
  const db = new DB(SPREADSHEET_ID);

  const last = db.last;

  let text = `<users/all> Please share your weekly update here.\n\n*Source Code*: <https://script.google.com/corp/home/projects/${ScriptApp.getScriptId()}/edit|Apps Script>`;

  if (last) {
    text += `\n*Last Week*: <${linkToThread(last)}|View thread>`;
  }

  const message = Chat.Spaces.Messages.create({
    text,
  }, PropertiesService.getScriptProperties().getProperty("spaceName") // Demo replaces => SPACE_NAME
  );

  db.append(message);

  console.log(`Thread Name: ${message.thread.name}`)
  return message.thread.name
}
Sends the message to create new standup instance. 
Called by trigger on interval of standup, e.g. Weekly

@return {string} The thread name of the message sent.