I don’t know how theme my login works. You can do it manually by checking if an user is logged in or not:
if ( is_user_logged_in() ) {
//user is logged in, put your regular codes
} else {
//user isn't logged in, create a login template and call from here
get_template_part ( 'content', 'login' ); //create your login form at content-login.php file
//or you can use the wp built in function to load the default form
wp_login_form();
}