object(Exception)#7 (7) {
  ["message":protected]=>
  string(38) "400;Bad Request: Credentials not valid"
  ["string":"Exception":private]=>
  string(0) ""
  ["code":protected]=>
  int(0)
  ["file":protected]=>
  string(55) "/var/www/my.medical-tribune.de/doi/libs/rest_client.php"
  ["line":protected]=>
  int(270)
  ["trace":"Exception":private]=>
  array(3) {
    [0]=>
    array(5) {
      ["file"]=>
      string(55) "/var/www/my.medical-tribune.de/doi/libs/rest_client.php"
      ["line"]=>
      int(170)
      ["function"]=>
      string(12) "returnResult"
      ["class"]=>
      string(13) "CR\tools\rest"
      ["type"]=>
      string(2) "->"
    }
    [1]=>
    array(5) {
      ["file"]=>
      string(48) "/var/www/my.medical-tribune.de/doi/functions.php"
      ["line"]=>
      int(32)
      ["function"]=>
      string(4) "post"
      ["class"]=>
      string(13) "CR\tools\rest"
      ["type"]=>
      string(2) "->"
    }
    [2]=>
    array(3) {
      ["file"]=>
      string(58) "/var/www/my.medical-tribune.de/doi/confirm_newsletters.php"
      ["line"]=>
      int(5)
      ["function"]=>
      string(4) "init"
    }
  }
  ["previous":"Exception":private]=>
  NULL
}