Plugin css location

Hello, I made a custom plugin for my login page but I cant figure out how to move my custom plugin css to the plugin folder. I thought I was supposed to change /login/styles.css to /styles.css but that didnt work.

`function my_login() {
echo ‘<link rel=”stylesheet” type=”text/css” href=”‘ . get_bloginfo(‘stylesheet_directory’) . ‘/login/styles.css” />’;
}
add_action(‘login_head’, ‘my_login’);