Request Step by Step guide for FortiGate VPN Device Integration

FortiGate VPN Device Integration to FortiNAC.

I am currently working on integrating FortiGate with FortiNAC.I need assistance with the configuration steps and the guide that outlines how to properly integrate FortiGate (FGT) with FortiNAC (NAC) for VPN-based access control.
The officel guide I already read.Is there have any guide for this .