Unfortunately, I don’t think so… I mean, it depends on what access point you’re using, but I think generally you can’t.

I’m supposed to be looking at this project more over the next few months, but I’m pretty sure this isn’t in scope at all. You’d be better off setting this up on a server, and then finding some way to authenticate your users (presumably for free wifi access?) against generic Radius… but this is well out of scope for what I know. Sorry Bik.