New User Account Approval module is a very useful Odoo addon for filtering Users in Odoo.
The menu for checking Pending Users is added to the Users menu.
Create Public Users at SignUp.
User is redirected after Sign-Up and not allowed access till approval.
Navigate to the Users & Companies Menu, Click on Users Pending For Approval Sub-menu.You will see the Users List waiting for Access.
After giving approval to the user,that user is allowed to access the system as Public User.
User also recieves a mail as notification after the approval for access.
If the Admin rejects the User Request,the User is not allowed access.