$response
$response : \Qcloud\Cos\Exception\Response
$request : \Psr\Http\Message\RequestInterface
$requestId : string
$exceptionType : string
$exceptionCode : string
getCosRequestId() : string|null
Get the request ID of the error. This value is only present if a response was received, and is not present in the event of a networking error.
Same as getRequestId()
method, but matches the interface for SDKv3.
Returns null if no response was received