You can give guests access to your Wi-Fi via a guest account:
1. Go to Setup » Wi-Fi Integration.
2. Select the "Add Wi-Fi Guest Accounts" link at the bottom of the page.
3. Now you can input the login and password for the guest account.
4. Optionally, you can set an expiry date. If the field is left blank, the guest login will not expire.
5. Click "Add Account."
A list of all active accounts will be shown at the bottom of the screen for your reference.
Now, when a guest tries to access the internet in your space, they can only see your Cobot page/captive portal until they use their login and password to gain internet access.