adding question

jupiterone/questions/questions.yaml

@@ -1,4 +1,14 @@
 ---
 sourceId: managed:duo
 integrationDefinitionId: "${integration_definition_id}"
-questions: []
+questions: 
+  - id: integration-question-duo-users-without-mfa
+    title: Which DUO Users Don't Have MFA Enabled?
+    description: Finds all Duo users without MFA Enabled.
+    queries:
+      - query: |
+          FIND duo_user THAT !ASSIGNED mfa_device
+    tags:
+      - duo
+      - access
+      - mfa