adding cli for aaa to show users

Change-Id: I23092577a6da8f43b959a11b9590c282f4d50a5c
diff --git a/src/main/java/org/onosproject/aaa/StateMachine.java b/src/main/java/org/onosproject/aaa/StateMachine.java
index 6b8ebcb..cb9291c 100644
--- a/src/main/java/org/onosproject/aaa/StateMachine.java
+++ b/src/main/java/org/onosproject/aaa/StateMachine.java
@@ -124,6 +124,10 @@
         identifierMap = null;
     }
 
+    public static Map<String, StateMachine> sessionIdMap() {
+        return sessionIdMap;
+    }
+
     public static StateMachine lookupStateMachineById(byte identifier) {
         return identifierMap.get((int) identifier);
     }