Reduce nesting for the sample authentication decorator (#1715)

* Reduce nesting for the sample authentication decorator

* Add missing decorator argument

examples/authorized_sanic.py

@@ -13,28 +13,26 @@ def check_request_for_authorization_status(request):
     return flag
 
 
-def authorized():
-    def decorator(f):
-        @wraps(f)
-        async def decorated_function(request, *args, **kwargs):
-            # run some method that checks the request
-            # for the client's authorization status
-            is_authorized = check_request_for_authorization_status(request)
+def authorized(f):
+    @wraps(f)
+    async def decorated_function(request, *args, **kwargs):
+        # run some method that checks the request
+        # for the client's authorization status
+        is_authorized = check_request_for_authorization_status(request)
 
-            if is_authorized:
-                # the user is authorized.
-                # run the handler method and return the response
-                response = await f(request, *args, **kwargs)
-                return response
-            else:
-                # the user is not authorized.
-                return json({'status': 'not_authorized'}, 403)
-        return decorated_function
-    return decorator
+        if is_authorized:
+            # the user is authorized.
+            # run the handler method and return the response
+            response = await f(request, *args, **kwargs)
+            return response
+        else:
+            # the user is not authorized.
+            return json({'status': 'not_authorized'}, 403)
+    return decorated_function
 
 
 @app.route("/")
-@authorized()
+@authorized
 async def test(request):
     return json({'status': 'authorized'})