สอบถามการข้อข้อมูล Array มาแสดงครับ โดยดึงมาจาก API Postman PHP crul

<div class="container">
            <div class="d-flexs align-items-center mt-5 text-center centered">
                <table class="table">
                    <thead>
                        <tr>
                            <th scope="col">#</th>
                            <th scope="col">วันเกิด</th>
                            <th scope="col">HN</th>
                            <th scope="col">cid</th>
                            <th scope="col">name</th>
                            <th scope="col">last_name</th>
                            <th scope="col">หมายเหตุ</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php
                        $curl = curl_init();
                        curl_setopt_array($curl, array(
                            CURLOPT_URL => 'https://canceranywhere.com/caw-gateway/patient',
                            CURLOPT_RETURNTRANSFER => true,
                            CURLOPT_ENCODING => '',
                            CURLOPT_MAXREDIRS => 10,
                            CURLOPT_TIMEOUT => 0,
                            CURLOPT_FOLLOWLOCATION => true,
                            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                            CURLOPT_CUSTOMREQUEST => 'GET',
                            CURLOPT_HTTPHEADER => array(
                                'Authorization: Basic OTk5OTk6YWRtaW4=',
                                'Cookie: JSESSIONID=CD964D5DF21EDED899CAAA99C7A67AE1'
                            ),
                        ));
                        $response = curl_exec($curl);
                        $obj = json_decode($response);

                        echo $obj[1]->birth_date;
                        $html = '';
                        $n = 0;
                        for ($i = 0; $i < count($obj); $i++) {
                            $n++;
                            $html .= '<tr>
                                    <th scope="row">' . $n . '</th>
                                    <td>' . $obj[$i]->birth_date . '</td>
                                    <td>' . $obj[$i]->patient_id . '</td>
                                    <td>' . $obj[$i]->cid . '</td>
                                    <td>' . $obj[$i]->name . '</td>
                                    <td>' . $obj[$i]->last_name . '</td>
                                    <td>' . $obj[$i]->updated_at . '</td>
                                    </tr>
                                    ';
                        }


                        echo $html;

                        curl_close($curl);

                        ?>

                    </tbody>
                </table>
            </div>
        </div>