code: def twitter_timeline(screen_name, since_id=None):
      
      consumer_key = twitter_credential('consumer_key')
      consumer_secret = twitter_credential('consumer_secret')
      access_token = twitter_credential('access_token')
      access_token_secret = twitter_credential('access_secret')
      auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
      auth.set_access_token(access_token, access_token_secret)
      api = tweepy.API(auth)
      return get_all_tweets(screen_name, api, since_id)
docs: Return relevant twitter timeline