 Security key may be blank.
 
 ```
-  curl -u sk_abcdefQWERTY090900000000: \\
+  curl -u : \\
     -d path=Public \\
     -d project_id=9a19cca3-c53d-4c7c-8c0f-e166aada7bb6 \\
     https://cocalc.com/api/v1/public_get_directory_listing

       "id":"9dd3ef3f-002b-4893-b31f-ff51440c855f"}
```

Examples of _set_ query.

Set title and description for a project, given the project id.
```

         "id":"ec822d6f-f9fe-443d-9845-9cd5f68bac20"}
```

Set present user to open Jupyter notebooks in
"Modern Notebook" as opposed to "Classical Notebook".
This change not usually needed, because accounts
default to "Modern Notebook".

It is not necessary to specify the entire `editor_settings` object
if you are only setting the `jupyter_classic` attribute.
```
  curl -u sk_abcdefQWERTY090900000000: \\
    -H "Content-Type: application/json" \\
    -d '{"query":{"accounts":{"account_id":"29163de6-b5b0-496f-b75d-24be9aa2aa1d","editor_settings":{"jupyter_classic":false}}}}' \\
    https://cocalc.com/api/v1/query
  ==> {"event":"query",
       "multi_response":false,
       "id":"9dd3ef3f-002b-4893-b31f-ff51440c855f",
       "query": {}}
```


__NOTE:__ Information on which fields are gettable and settable in the database tables
via API message is in file 'db-schema.coffee', in CoCalc sources on GitHub at
