input: Write a python function to get the last 5 tweets from a user's timeline using Tweepy.
  ```python
  import tweepy
  
  def get_user_timeline(username, consumer_key, consumer_secret, access_token, access_token_secret):
      auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
      auth.set_access_token(access_token, access_token_secret)
      api = tweepy.API(auth)
      return [tweet.text for tweet in api.user_timeline(username, count=5)]
  
  # Test cases
  assert len(get_user_timeline('username', '<your_consumer_key>', '<your_consumer_secret>', '<your_access_token>', '<your_access_token_secret>')) == 5
  # Add other assert statements as needed for different test cases
output: import tweepy
  
  def get_user_timeline(username, consumer_key, consumer_secret, access_token, access_token_secret):
      auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
      auth.set_access_token(access_token, access_token_secret)
      api = tweepy.API(auth)
      return [tweet.text for tweet in api.user_timeline(username, count=5)]