post https://de1.api.central.arubanetworks.com/network-config/v1alpha1/captive-portal
Use this API to configure external captive portal profiles for guest users. For AP and GW, When the captive portal profile is applied to an SSID or a wired profile, the users connecting
to the SSID or wired network are assigned a role with the captive portal rule. For CX, when the client is 802.1x or MAC authenticated through RADIUS-server, the redirect parameters in this
profile can be applied through user-role, Downloadable User Role and RADIUS Vendor Specific Attribute. This feature is applicable for AP, CX and GW.