WordPress custom login Logo

custom-login-logo.php

<?php 
function custom_loginlogo() {
	echo '<style type="text/css">
	.login h1 a {background-image: url('.wp_get_attachment_image_src( get_theme_mod( 'custom_logo' ), 'large', false )[0]
		.') !important;
		pointer-events: none;
		background-size: contain;
	 	height: 100px;
		font-size: inherit;
		 width: auto; 
	  }
	</style>';
	}
add_action('login_head', 'custom_loginlogo');