code: def tweet(ctx, created_at, twtfile, text):
      
      text = expand_mentions(text)
      tweet = Tweet(text, created_at) if created_at else Tweet(text)
  
      pre_tweet_hook = ctx.obj["conf"].pre_tweet_hook
      if pre_tweet_hook:
          run_pre_tweet_hook(pre_tweet_hook, ctx.obj["conf"].options)
  
      if not add_local_tweet(tweet, twtfile):
          click.echo("✗ Couldn’t write to file.")
      else:
          post_tweet_hook = ctx.obj["conf"].post_tweet_hook
          if post_tweet_hook:
              run_post_tweet_hook(post_tweet_hook, ctx.obj["conf"].options)
docs: Append a new tweet to your twtxt file.