Create readme.md

Author: sanjaykumar3sn

Core ServiceNow APIs/GlideAggregate/LicensedUserCount/readme.md

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+# Licensed User Count by Role Using GlideAggregate
+
+# Overview
+This script counts how many **licensed users** hold specific ServiceNow roles using the `GlideAggregate` API.  
+It’s useful for **license compliance**, **role audits**, and **access management reporting**.
+
+The licensed roles analyzed:
+- sys_approver  
+- itil  
+- business_stakeholder  
+- admin  
+
+# Objective
+To provide a simple, fast, and accurate way to count licensed users per role directly at the database level using `GlideAggregate`.