====> 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 (7) {
    ["statusCode"]=>
    int(-1)
    ["headers"]=>
    array(0) {
    }
    ["normalizedHeaders"]=>
    NULL
    ["body"]=>
    NULL
    ["error"]=>
    string(48) "transfer closed with 101 bytes remaining to read"
    ["jsonData":"Qiniu\Http\Response":private]=>
    NULL
    ["duration"]=>
    float(0.238)
  }
}