input: 
  def automate_login(website_url: str, username_value: str, password_value: str) -> str:
      """
      Automate the login process on a specified website using Selenium.
      
      >>> automate_login('http://www.example.com', 'myusername', 'mypassword')
      'Login successful!'
      """
      from selenium import webdriver
      from selenium.webdriver.common.keys import Keys
      import time
  
      # Initialize web driver
      driver = webdriver.Chrome()
  
      # Navigate to the target web page
      driver.get(website_url)
  
      # Locate username field
      username = driver.find_element_by_name('username')
  
      # Enter username
      username.send_keys(username_value)
  
      # Locate password field
      password = driver.find_element_by_name('password')
  
      # Enter password
      password.send_keys(password_value)
  
      # Locate submit button
      submit_button = driver.find_element_by_name('submit')
  
      # Click submit button
      submit_button.click()
  
      # Wait for login process to complete
      time.sleep(5)
  
      # Login successful
      result = 'Login successful!'
      driver.close()
      return result
  
output:     try:
          # Check if login was successful by looking for a specific element on the page
          success_element = driver.find_element_by_id('login-success')
      except:
          result = 'Login failed!'
      
      driver.quit()
      return result