Add unit test for missing authentication on required authenticated command.
diff --git a/tools/cli/wskutil.py b/tools/cli/wskutil.py
index 75b7a38..a473099 100644
--- a/tools/cli/wskutil.py
+++ b/tools/cli/wskutil.py
@@ -47,11 +47,8 @@
 
 def addAuthenticatedCommand(subcmd, props):
     auth = props.get('AUTH')
-    #if auth is not None:
-    subcmd.add_argument('-u', '--auth', help='authorization key', default=auth)
-    #else:
-        # If a default authorization key is missing, make this a required positional argument
-        #subcmd.add_argument('auth', help='authorization key', default=auth)
+    required = True if auth is None else False
+    subcmd.add_argument('-u', '--auth', help='authorization key', default=auth, required=required)
 
 def request(method, urlString, body = '', headers = {}, auth = None, verbose = False):
     url = urlparse(urlString)