input: Write a function called get_recent_tweets that takes a Twitter username as input and returns the most recent tweets from that user. The function should authenticate with Twitter using the OAuthHandler method and then use the user_timeline method to fetch the tweets. If the authentication or fetching fails, the function should return an error message.
  assert get_recent_tweets("@elonmusk")==['Tweet1 text', 'Tweet2 text']
  assert get_recent_tweets("@no_such_user")=="Error: Unable to fetch tweets"
output: def get_recent_tweets(username):
      try:
          auth = tweepy.OAuthHandler("consumer_key", "consumer_secret")
          auth.set_access_token("access_token", "access_token_secret")
          api = tweepy.API(auth)
          tweets = api.user_timeline(screen_name=username, count=2)
          return [tweet.text for tweet in tweets]
      except:
          return "Error: Unable to fetch tweets"