Add custom logo and message

Hi, for those who need to change the logo and add a message above the login form, here is the snippet:

<?php
	function custom_login_page() { 
		?> 
		<style type="text/css"> 
		body.login div#login h1 a {
			background-image: url(https://path-to-image.com/logo.png); 
		}
		body.login p {
			text-align: center;
		}		
		</style>
		<?php 
	} 
	add_action( 'login_enqueue_scripts', 'custom_login_page' );
		
	function add_message() {    
		echo '<p>Hello World!</p>';		
	}
	add_action( 'password_protected_login_message', 'add_message' );
?>

You can add this to your function.php child theme.

How to create a child theme?