How to check on the number of Service Desk Agents in a single JSM Project?

[Craig Duffy]

We have a LOT of users, and a limited number of JSM licenses. We have restricted each JSM project to only have a maximum of 5 Service Desk Agents to keep the license count down. 

How can I check on the number of ACTUAL Service Desk Agents in a single project? 

The admins for the project may have a lot of users assigned as Service Desk Agents in the project (in some cases over 100), however they do not all have licenses for JSM. But I dont see how I can run a report to confirm how many actual, licensed Service Desk Agents are in a single project. 

For example: a Jira Project Lead assigns 30 people as Service Desk Agents. As a Jira admin, Id like to see -out of those 30 assigned Service Desk Agents- how many actually have a license. 
Note: we are on Data Center.

thank you