Update authorization tutorial

doc/how_to/authentication/authorization.md

@@ -22,15 +22,15 @@ You may return either a boolean `True`/`False` value OR a string, which will be
 ```python
 def authorize(user_info, page):
  user = user_info['user']
- if page == '/':
+ if page == "/":
  if user in ADMINS:
-  return '/admin'
-  else:
-  return '/user'
+  return '/admin'
+  else:
+  return '/user'
  elif user in ADMINS:
-  return True
- else:
-  return page.startswith('/user')
+  return True
+ else:
+  return page.startswith('/user')
 ```
 
 The callback above would direct users visiting the root (`/`) to the appropriate endpoint depending on whether they are in the list of `ADMINS`. If the user is an admin they are granted access to both the `/user` and `/admin` endpoints while non-admin users will only be granted access to the `/user` endpoint.
@@ -60,13 +60,10 @@ authorized_user_paths = {
 }
 
 def authorize(user_info, request_path):
- current_user = user_info['username']
- current_path = parse.urlparse(request_path).path
- if current_user not in authorized_user_paths:
- return False
- current_user_paths = authorized_user_paths[current_user]
- if current_path in current_user_paths:
- return True
+ if current_user := authorized_user_paths.get(user_info['username']):
+ current_path = parse.urlparse(request_path).path
+ current_user_paths = authorized_user_paths[current_user]
+ return current_path in current_user_paths
  return False
 
 pn.config.authorize_callback = authorize