object(SendGrid\Response)#12 (3) {
  ["statusCode":protected]=>
  int(401)
  ["body":protected]=>
  string(76) "{"errors":[{"message":"Maximum credits exceeded","field":null,"help":null}]}"
  ["headers":protected]=>
  array(15) {
    [0]=>
    string(21) "HTTP/1.1 100 Continue"
    [1]=>
    string(0) ""
    [2]=>
    string(25) "HTTP/1.1 401 Unauthorized"
    [3]=>
    string(13) "Server: nginx"
    [4]=>
    string(35) "Date: Mon, 02 Mar 2020 15:07:41 GMT"
    [5]=>
    string(30) "Content-Type: application/json"
    [6]=>
    string(18) "Content-Length: 76"
    [7]=>
    string(22) "Connection: keep-alive"
    [8]=>
    string(57) "Access-Control-Allow-Origin: https://sendgrid.api-docs.io"
    [9]=>
    string(34) "Access-Control-Allow-Methods: POST"
    [10]=>
    string(86) "Access-Control-Allow-Headers: Authorization, Content-Type, On-behalf-of, x-sg-elas-acl"
    [11]=>
    string(27) "Access-Control-Max-Age: 600"
    [12]=>
    string(74) "X-No-CORS-Reason: https://sendgrid.com/docs/Classroom/Basics/API/cors.html"
    [13]=>
    string(0) ""
    [14]=>
    string(0) ""
  }
}