How to check a password for an SSId is right or not on android 10 APP

Question

I am implementing an APP through Xamarin.

The APP need to check a password for an SSId is right or not.

So I issued a wifi connection to check it.

Here is the code.

var specifier = new WifiNetworkSpecifier.Builder()
    .SetSsid("Target_SSID")
    .SetWpa2Passphrase("Target_Password")
    .SetBssid(MacAddress.FromString("Target_Mac"))
    .Build();
var request = new NetworkRequest.Builder()
    .AddTransportType(TransportType.Wifi)
    .SetNetworkSpecifier(specifier)
    .Build();
var callback = new NetworkCallback
{
    NetworkAvailable = network =>
    {
        // we are connected!
    }
};
ConnectivityManager connectivityManager = (ConnectivityManager)Android.App.Application.Context.GetSystemService(Context.ConnectivityService);
connectivityManager.RequestNetwork(request, callback);

But what I found out is.

If the mobile didn't connected to the SSID before. Then this works fine.

BUT if the mobile phone has a connected record in it's system.

Even The APP passed a WRONG password. After execute this code.

The mobile phone still connect to the SSID successfully.

Why?

This make me not able to confirm the password is right or not.