Login with email address or username

Hi,
Adding below code to your _functions.php will enable your users to login with their email address or username. At the moment one can login only with username.

function login_with_email_address($username) {
$user = get_user_by_email($username);
if(!empty($user->user_login))
$username = $user->user_login;
return $username;
}
add_action(‘wp_authenticate’,’login_with_email_address’);