input: def automate_login(website: str, username: str, password: str) -> str:
      """Automates the login process in a given website using Selenium.
      >>> automate_login('http://www.example.com', 'username', 'password')
      'Login successful!'
      """
output:     from selenium import webdriver
      from selenium.webdriver.common.by import By
      from selenium.webdriver.common.keys import Keys
      import time
  
      driver = webdriver.Chrome()
      driver.get(website)
  
      time.sleep(2)
  
      username_field = driver.find_element(By.ID, 'username')
      password_field = driver.find_element(By.ID, 'password')
  
      username_field.send_keys(username)
      password_field.send_keys(password)
  
      password_field.send_keys(Keys.RETURN)
  
      time.sleep(2)
  
      if 'Login successful!' in driver.page_source:
          driver.quit()
          return 'Login successful!'
      else:
          driver.quit()
          return 'Login failed!'