How to get license date expiration automatically?

Hi all,

I want to create a script which it send signals "0, 1 or 2" in our checkmk when the license will be expired or not. However, few Fortinet's equipment hasn't license detail in cli and we can't take the expiration date in a variable. I want to get license expiration for FortiGate, FortiAuthenticator, FortiAnalyzer, FortiManager and FortiEMS. How can I get license expiration for these equipments automatically?