Render Custom Post Field data with Shortcode

/**
* Render Custom Post Field data with Shortcode
**/

function show_post_custom_field_meta( $atts ){
     global $post;
     $key=$atts['name'];
     if(empty($key)) return;
    return get_post_meta($post->ID, $key, true);
}
add_shortcode( 'post_custom_field', 'show_post_custom_field_meta' ); // Usage: [post_custom_field name="email_address_1"]