you see im from l2 interface send data to server before login via "RequestPCCafeCouponUse("your data bla bla bla"); and then hook this function in DLL:
?RequestPCCafeCouponUse@UNetworkHandler@@UAEXVFString@@@Z
int __fastcall new_RequestPCCafeCouponUse(unsigned int This, wchar_t * data) {
// extract your info from data variable... which u send from interface RequestPCCafeCouponUse
fpRequestAuthLogin(This, L"ID",L"PASS" ,0);
return 0;
}