1. You can manage users in Drupal by going to Administer -> User Management.

2. You will have five sections here, here is a short explanation of each:
Access Rules - from here you can define the access rules for your Drupal installation. You can disallow users, emails, and IP addresses.
Permissions - in this section you can see which modules will be available to your site's visitors.
Roles - Here you can add rules for anonymous and authenticated users. You can assign roles such as administrators, moderators, etc.
User Settings
- this section allows you to configure the registration settings for
new users and allow an email to be sent to notify of a new registration
and password recovery.
Users - this will show a
list of all of your site's current users. You can add new users and
block existing ones as well from this section.
