Adjust Logo Height/Width on WP Admin login screen

For version 1.9.3+ :

Go to WP Admin -> WPLMS -> Miscellaneous -> Custom CSS for Login screen :

Add this code :

body.login h1 a{
            width:160px;
            height:400px;
        }

Adjust the width and height according to your requirements.

You can use this section for various other styling options as well :

For version < 1.9.2

1. Go to WP Admin -> Plugins -> WPLMS customizer -> customizer-_class.php
2. Add this code in __construct function

PHP Code:

add_action( 'login_enqueue_scripts',array($this, 'vibe_login_logo' ));

3. Add this code in the class:

function vibe_login_logo() {   
    ?>
    <style type="text/css">`
        .login h1 a{
            width:160px;
            height:400px;
        }
    </style>
<?php 
}