Logging in to the server from the editor is possible from version 19.2.
When you open the editor, you'll be requested to add your login credentials.
In the Server URL field, the one higher on the page (see screenshot below), you should add the url of the server hosting your Newired Journeys and Tips. The URL you should type is the one used to access Newired Portal in its root form.
https://demo.newired.com/ is correct,
https://demo.newired.com/site/230/journeys is wrong, because it redirects to the Journeys page of the server.
In the Username and Password field you should put credentials you’ve received to access Newired Portal.
For administrator accounts, the login details come by default as username: admin and password: admin. This account will be responsible for creating the other accounts for all the company’s Journey and Tip authors.
For more information on how to manage the portal, check this article.