Profecient || Add Google Analytics code to the site

if ( ! function_exists( 'add_google_analytics_code' ) ) {
    /**
     * Add Google Analytics code to the site
     */
    function add_google_analytics_code() {
        // INSERT YOUR CODE HERE
        echo '<script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXXXX-X"></script>';
    }
    add_action( 'wp_head', 'add_google_analytics_code' );
}