Only client name

I found a solution. And you can hide the name and mail form in the form:
.cr-review-form-ne{display:none;}

add_filter( 'get_comment_author', 'wpse_use_user_first_name_only', 10, 3 );
function wpse_use_user_first_name_only( $author, $comment_id, $comment ) {

    $firstname = '';
    $user_id = $comment->user_id;
    if ( $user_id ) {
        $user_object = get_userdata( $user_id );
        $firstname = $user_object->user_firstname; 
    }
    if ( $firstname ) {
        $author = $firstname;
    }
    return $author;
}

Thank you for starting a topic and then sharing a solution ??