Creating a WiFi network on a FortiWiFi unit that implements WPA security with individual authentication for your WiFi users. Create user accounts and a user group. Modify the SSID to use WPA/WPA2-Enterprise security and authenticate users who belong to the user group. There is no longer a pre-shared key that could fall into the wrong hands or would need to be changed if someone left the group. Each user has an individual user name and password. Accounts can be added or removed as needed.
The original article/video can be found at FortiGate Cookbook – Improving WiFi security with WPA