400{"errors":[{"field":null,"message":"authorization required"}]}<br />
<b>Notice</b>:  Array to string conversion in <b>C:\Landaweb\webs\server\vendor\sendgrid\php-http-client\examples\example.php</b> on line <b>20</b><br />
Array<br />
<b>Notice</b>:  Undefined index: api_key_id in <b>C:\Landaweb\webs\server\vendor\sendgrid\php-http-client\examples\example.php</b> on line <b>39</b><br />