401{"errors":[{"field":null,"message":"authorization required"}]}<br />
<b>Warning</b>:  Array to string conversion in <b>C:\xampp\htdocs\adminlte3\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>C:\xampp\htdocs\adminlte3\vendor\sendgrid\php-http-client\examples\example.php</b> on line <b>39</b><br />