If I understand you correctly you want a login page and someone who can administer users.
Open Projects and click on security. Set the security level to production then click on administrator and change the password. Disable Anomous user.
This will give you a login page (where you can initially login with the admin account)
After that you will have access to an account page where you can create users.
Manish, set the model (security setting) to production. And you can use the roles to define a starting page for each role. Go to Navigation tab desktop and you find the Role based home page section.
Check the documentation for more info.