input: Write a function that queries Twitter to get the most recent tweets from a specified user and prints them. The function should take a Twitter username as input and output the text of the most recent tweets. To authenticate, use tweepy.OAuthHandler with your "CONSUMER_KEY" and "CONSUMER_SECRET", and then set the access token using your "ACCESS_TOKEN" and "ACCESS_TOKEN_SECRET". Finally, use the tweepy.API object to fetch and print the tweets from the specified user.
  
  
  assert get_recent_tweets("@elonmusk")==['Tweet 1 text', 'Tweet 2 text', 'Tweet 3 text']
  assert get_recent_tweets("@techcrunch")==['TechCrunch Tweet 1 text', 'TechCrunch Tweet 2 text', 'TechCrunch Tweet 3 text']
  assert get_recent_tweets("@billgates")==['Bill Gates Tweet 1 text', 'Bill Gates Tweet 2 text', 'Bill Gates Tweet 3 text']
  assert get_recent_tweets("@empty_user")==[]
  assert get_recent_tweets(None)==None
  
output: import tweepy
  
  def get_recent_tweets(username):
      if not username:
          return None
      
      CONSUMER_KEY = "your_consumer_key"
      CONSUMER_SECRET = "your_consumer_secret"
      ACCESS_TOKEN = "your_access_token"
      ACCESS_TOKEN_SECRET = "your_access_token_secret"
      
      auth = tweepy.OAuthHandler(CONSUMER_KEY, CONSUMER_SECRET)
      auth.set_access_token(ACCESS_TOKEN, ACCESS_TOKEN_SECRET)
      
      api = tweepy.API(auth)
      
      try:
          tweets = api.user_timeline(screen_name=username, count=3, tweet_mode="extended")
          return [tweet.full_text for tweet in tweets]
      except tweepy.TweepError:
          return []