Is your feature request related to a problem? Please describe.
Provide back-end interface for users to self-register. Through self-service user registration, users can create their own accounts. However, the account can only be logged into the system after the administrator passes the review. Registration
information includes: user name, password, email

Describe the solution you'd like
Here is mailing-list about the solution to this feature
mail-discuss

Why this new feature is useful for most users
Can reduce the burden of administrators to add users, giving ordinary users the right to self-registration