User authentication in a SaaS application typically involves the following steps:
- Registration: Users create an account with unique credentials.
- Authentication: Users verify their identity through passwords, OTPs, or biometric data.
- Access Control: Permissions are assigned based on user roles to restrict access to certain features or data.
- Single Sign-On: Users can access multiple services with a single set of credentials.
Access control mechanisms like role-based access control (RBAC) or attribute-based access control (ABAC) are used to define and enforce user permissions. Secure protocols like OAuth or OpenID Connect are employed for secure authentication.