Show first name in leaderbaord

/**
 * Add First Name to Leaderbaords
 * @version 1.0
 */
function mycred_pro_customize_leaderboard_row( $layout, $template, $user ) {

    $name = '';
    if ( is_array( $user ) ) {
        $user = get_userdata( $user['ID'] );
        if ( isset( $user->first_name ) )
            $name = $user->first_name;
    }
    elseif ( is_object( $user ) )
        $name = $user->first_name;

    return str_replace( '%firstname%', $name, $layout );

}
add_filter( 'mycred_ranking_row', 'mycred_pro_customize_leaderboard_row', 10, 3 );