Navigate to Users and click Invite
Enter the user's email and select their role, then click Invite this user.
Note: The user will now show as a pending invite, but they cannot be added to regions or stacks until they log in for the first time
This will send an invite email to their email address. Have them retrieve the link and follow the on-screen instructions to set up their user
Note: The password is required to be between 14 and 128 characters, have at least 1 uppercase character, at least 1 special character, and at least 1 number.
Once the user has logged in for the first time, the Invite Pending message will disappear from beside their name (you will need to refresh to update this), and you will be able to add them to regions and stacks