def twitter_timeline(screen_name, since_id=None):
    """ Return relevant twitter timeline """
    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)
Return relevant twitter timeline