<?php
    // do send email here
    $url = 'https://api.sendgrid.com/';
    $user = 'telepro_api';
    $pass = 'TeleApi4.0';

    $header = array(
        'Authorization: Bearer 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',
        'Content-Type: application/json'
    );

    $params = array(
        'personalizations' => array(
            'to'        => array('quang@telepro.me'),
            'dynamic_template_data' => array(
                'fullname' => 'A Quang',
                'content' => 'test noi dung transactional email'
            )
        ),
        'subject'   => '[TelepPro] $$$ into your balance!',
        'from'      => 'no-reply@telepro.me',
        'template_id' => 'd-5c385e95cf434715b0bb961979a8beed'
    );

    $request =  $url . 'v3/mail/send';

    // Generate curl request
    $session = curl_init($request);
    curl_setopt ($session, CURLOPT_POST, true);
    curl_setopt ($session, CURLOPT_POSTFIELDS, $params);
    curl_setopt($session, CURLOPT_HTTPHEADER, $header);
    curl_setopt($session, CURLOPT_HEADER, false);
    curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
    curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

    // obtain response
    $response = curl_exec($session);
    curl_close($session);

    var_dump($response);

?>