A prerequisite for Facebook WiFi as portal login according to the second point Facebook Wifi is that you must have a business page on Facebook with a physical address listed in your page info. You must also be an administrator for your business page – Facebook Page.
Unsaid above, as I say, a Facebook page is like an advertisement flag for your website, in the same way that an appealing SSID (WiFi) is. When we are still on the subject business page on Facebook, as a prerequisite for Facebook WiFi, I will describe the procedure more in detail in Facebook Wifi by TP-Link