change wordpress login logo without plugin

1if ( function_exists( 'the_custom_logo' ) ) {
2 the_custom_logo();
3}
4

1add_theme_support( 'custom-logo' );
2

1function wpb_login_logo() { ?>
2    <style type="text/css">
3        #login h1 a, .login h1 a {
4            background-image: url(http://path/to/your/custom-logo.png);
5        height:100px;
6        width:300px;
7        background-size: 300px 100px;
8        background-repeat: no-repeat;
9        padding-bottom: 10px;
10        }
11    </style>
12<?php }
13add_action( 'login_enqueue_scripts', 'wpb_login_logo' );
14