Joining the portal
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Anonymous users can join the portal
If the portal requires email validation then the portal assigns the password and sends it by email
User names cannot be duplicates
Passwords must be at least 5 characters long
A password confirmation must be supplied
Password and confirmation must be thes same

Users who can select their own password proceed to the login form
Users who

User managers can register users
Logged in users cannot register users. Instead they can adjust their preferences.
