Unity SDK - How to know if user is already authenticated

Help - Plug n Play Unity SDK
1

Using the base example provided, there´s the following situation: once the user has authenticated once, on subsequent runs the user will be already authenticated (unless the session has expired or user has manually logged off, I suppose) but the web browser pop up will still show, asking to login again, which will trigger onLogin once more.

How do I detect that the user is already authenticated so I can prevent the pop up from showing again?

Looking for something like this:

void Start()
    {
        web3Auth = GetComponent<Web3Auth>();
        web3Auth.setOptions(new Web3AuthOptions()
        {
            redirectUrl = new Uri(""),
            clientId = "",
            network = Web3Auth.Network.TESTNET,
        });
         web3Auth.onLogin += onLogin;
         web3Auth.onLogout += onLogout;
////////////
if(!web3Auth.loggedin)
        login();
///////////
    }

Thanks.