Using CaptiveNetwork to Authenticate a Wi-Fi Network

Question

I am trying to use the CaptiveNetwork api application to authenticate my application with known wifi networks. I can register my application with CNSetSupportedSSIDs , which prevents os from displaying the web sheet. However, there is little documentation, in fact there is little information, anywhere, about how my application is notified after establishing a connection to a registered network. Perhaps I missed something?

If anyone has tips on where to look, or knows about applications that authenticate with wifi, so I can check their use case or something that I obviously missed, let me know.

Thanks.