🚀 go-pugleaf

I tried to get client's name by using CoInitializeSecurity() and
CoQueryClientBlanket() functions. But CoInitializeSecurity() function I
implemented as followed always return the result = -2147221008 switch to
default. Can anyone tell me what wrong  in my parameters? Thanks.

 SOLE_AUTHENTICATION_SERVICE serv;
 serv.pPrincipalName = NULL;
 serv.dwAuthnSvc = RPC_C_AUTHN_NONE;
 serv.dwAuthzSvc = RPC_C_AUTHZ_DCE;
 HRESULT retCode = CoInitializeSecurity(NULL, -1, &serv, NULL,\
       RPC_C_AUTHN_LEVEL_NONE, NULL, NULL,\
       EOAC_NONE, NULL);

 switch(retCode)
 {
 case S_OK:
        TRACE0("CoInitializeSecurity Success.\n");
        break;
 case RPC_E_TOO_LATE:
        TRACE0("CoInitializeSecurity has already been called.\n");
        break;
 case RPC_E_NO_GOOD_SECURITY_PACKAGES:
        TRACE0("asAuthSvc was not NULL and none of the authentication
services in the list could be registered.\n");
        break;
 default:
        TRACE0("Fail call CoInitializeSecurity.\n");
        break;
 }