====> create signature result: 
object(Qiniu\Http\Error)#3 (2) {
  ["url":"Qiniu\Http\Error":private]=>
  string(37) "https://sms.qiniuapi.com/v1/signature"
  ["response":"Qiniu\Http\Error":private]=>
  object(Qiniu\Http\Response)#5 (6) {
    ["statusCode"]=>
    int(-1)
    ["headers"]=>
    array(0) {
    }
    ["body"]=>
    NULL
    ["error"]=>
    string(44) "OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 0"
    ["jsonData":"Qiniu\Http\Response":private]=>
    NULL
    ["duration"]=>
    float(1.166)
  }
}