For a full summary of how to add users to Cascade, see this article: Adding Users.
When you create a new user (or at any time), you can notify them by email of their login details. They will receive a username and a randomly generated password for Cascade.
First, go to Profile > Organization and the Users tab.
Next, locate a user you would like to notify and click on the mail icon.
Here you will be able to select which users you wish to notify, by ensuring they sit inside the panel on the right.
Select Next and confirm you would like the notification to be sent by selecting Send Emails.
Note: When you notify a user, users who have previously been notified will be marked with a “Notified” label next to their name. If you do send a notification email to someone who has already been notified, their password will be reset to a randomly generated one – so be aware of this before you send notifications to users who may already be using the system.