Guest wireless access??? HELP

I’d like to allow guest users to my business, Wireless internet access, without joe bloggs across the road pinching my bandwidth, i have seen a system where users are supplied with a SSID, unsecured,then supplied HTTPS URL where they then need to enter a username and password. Access to the internet is denied unless they authenticate on this URL. if they sucsessfully authenticate they are presented with a succsessful connection message, “keep this window open while you brouse the internet”
If you close the succsessful connection window your internet access is terminated, can anyone help me with something like this???