User login or access refers to the process of authenticating and authorizing users to perform specific actions on a website, application, or system. This involves verifying the user's identity, validating their credentials, and granting access to protected resources.
Types of User Login Systems
- Username-Password (UPA) authentication: Uses a username and password for login
- Two-Factor Authentication (2FA): Requires two authentication factors, such as password and fingerprint, to log in
- Email verification: Verifies the user's email address through a separate system
