Blocking an IP Address using a Web API Calls to a Fortinet Firewall

Hello,

I'm actually trying to build a WebService which communicates with a Fortinet Firewall, Some of the methods in the WebService requires that i need to send an IP Address to the Firewall. and the firewall must add it to the blocked list.

Is there any way that allow me to implement this feature ?

Any response is welcomed, Thank you in advance.