public void login()
        {
            AGConnectAuth auth = AGConnectAuth.getInstance();

            auth.signInAnonymously().addOnSuccessListener(new HuaweiOnsuccessListener <SignInResult> ((signresult) => {
                TestTip.Inst.ShowText("sign in successfully." + signresult.getUser().getUid());
            })).addOnFailureListener(new HuaweiOnFailureListener((e) => {
                TestTip.Inst.ShowText("sign in failed");
            }));
        }