public Credential(String keyId, String secret, int expiredHours) {this.accessKeyId = keyId;this.accessSecret = secret;this.refreshDate = new Date();setExpiredDate(expiredHours);}

public Credential(string keyId, string secret, int expiredHours){AccessKeyId = keyId;AccessSecret = secret;RefreshDate = new DateTime();SetExpiredDate(expiredHours);}
