Change the Login Logo

functions.php

function my_login_logo() { ?>
    <style type="text/css">
        #login h1 a, .login h1 a {
            background-image: url('https://xxx.com/wp-content/uploads/2017/11/logo-3.png');
            width: auto;
            height: 76px;
            background-size: contain;
            background-position: center center;
        }
        #login h1 a:focus, 
        .login h1 a:fcous{
	        box-shadow: none;
        }
    </style>
<?php }
add_action( 'login_enqueue_scripts', 'my_login_logo' );