cakePHP v3.9.3 table class Entity $_accessible $data

1.table class setting

PeopleTable.php

C:\xampp\htdocs\mycakeapp\src\Model\Table

<?php
namespace App\Model\Table;

use Cake\ORM\Table;
class PeopleTable extends Table{

    public function initialize(array $config){                  $this->setTable('people');         $this->setDisplayField('name');         $this->setPrimaryKey('id');