Custom shortcode to display user meta for currently logged in user

user_meta_shortcode.php

<?php

// Custom shortcode to display user meta for currently logged in user
add_shortcode('intw_user_meta', 'intw_user_meta_func');
function intw_user_meta_func($atts) {
    if ( is_user_logged_in() ) {
		$current_user = wp_get_current_user();
		$content = '<p>Welcome, ' . $current_user->display_name . '!</p>';
		return $content;
	}
}