400{"errors":[{"field":null,"message":"authorization required"}]}<br />
<b>Warning</b>:  Array to string conversion in <b>/var/www/html/core/vendor/sendgrid/php-http-client/examples/example.php</b> on line <b>20</b><br />
Array<br />
<b>Warning</b>:  Undefined array key "api_key_id" in <b>/var/www/html/core/vendor/sendgrid/php-http-client/examples/example.php</b> on line <b>39</b><br />