public static string GetBindQQGroupSignature()
        {
            ApolloAccountInfo accountInfo = Singleton <ApolloHelper> .GetInstance().GetAccountInfo(false);

            if (accountInfo != null)
            {
                string text = string.Concat(new object[]
                {
                    accountInfo.OpenId,
                    "_",
                    Singleton <ApolloHelper> .GetInstance().GetAppId(),
                    "_",
                    Singleton <ApolloHelper> .GetInstance().GetAppKey(),
                    "_",
                    CGuildHelper.GetGroupGuildId(),
                    "_",
                    CGuildHelper.GetGuildLogicWorldId()
                });
                Debug.Log("signature=" + text);
                return(Utility.CreateMD5Hash(text, Utility.MD5_STRING_CASE.UPPER));
            }
            return(string.Empty);
        }