How to create REST API in Codeigniter 4?

CREATE TABLE employees (
id int(11) NOT NULL AUTO_INCREMENT COMMENT 'Primary Key',
name varchar(100) NOT NULL COMMENT 'Name',
email varchar(255) NOT NULL COMMENT 'Email Address',
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='datatable demo table' AUTO_INCREMENT=1;

INSERT INTO `employees` (`id`, `name`, `email`) VALUES
(1, 'Mahtab', 'mahtab@gmail.com'),
(2, 'Alam', 'alam@gmail.com'),
(3, 'Habib', 'habib@gmail.com'),
(4, 'Sana', 'sana@gmail.com'),
(5, 'Mahira', 'mahira@gmail.com'),
(6, 'Sara Kalam', 'sara@gmail.com'),
(7, 'Arham kalam', 'arham@gmail.com');

<?php
namespace App\Models;
use CodeIgniter\Model;

class EmployeeModel extends Model
{
protected $table = 'employees';
protected $primaryKey = 'id';
protected $allowedFields = ['name', 'email'];
}

<?php namespace App\Controllers;
use CodeIgniter\RESTful\ResourceController;
use CodeIgniter\API\ResponseTrait;
use App\Models\EmployeeModel;


class Employee extends ResourceController
{
use ResponseTrait;

// all users
public function index(){
$model = new EmployeeModel();
$data['employees'] = $model->orderBy('id', 'DESC')->findAll();
return $this->respond($data);
}

// create
public function create() {
$model = new EmployeeModel();
$data = [
'name' => $this->request->getVar('name'),
'email' => $this->request->getVar('email'),
];
$model->insert($data);
$response = [
'status' => 201,
'error' => null,
'messages' => [
'success' => 'Employee created successfully'
]
];
return $this->respondCreated($response);
}

// single user
public function show($id = null){
$model = new EmployeeModel();
$data = $model->where('id', $id)->first();
if($data){
return $this->respond($data);
}else{
return $this->failNotFound('No employee found');
}
}

// update
public function update($id = null){
$model = new EmployeeModel();
$id = $this->request->getVar('id');
$data = [
'name' => $this->request->getVar('name'),
'email' => $this->request->getVar('email'),
];
$model->update($id, $data);
$response = [
'status' => 200,
'error' => null,
'messages' => [
'success' => 'Employee updated successfully'
]
];
return $this->respond($response);
}

// delete
public function delete($id = null){
$model = new EmployeeModel();
$data = $model->where('id', $id)->delete($id);
if($data){
$model->delete($id);
$response = [
'status' => 200,
'error' => null,
'messages' => [
'success' => 'Employee successfully deleted'
]
];
return $this->respondDeleted($response);
}else{
return $this->failNotFound('No employee found');
}
}

}

$routes->resource('employee');

https://mfikri.com/en/blog/codeigniter4-restful-api