> ## Documentation Index > Fetch the complete documentation index at: https://docs.prelude.so/llms.txt > Use this file to discover all available pages before exploring further. # Introduction to Auth > Manage the full lifecycle of your users' authentication. To enable Prelude Auth on your account, [contact us](mailto:support@prelude.so). ## Overview Prelude Auth provides a comprehensive solution for managing user authentication and session in your application. With this API, you can create and manage users, handle authentication, track active sessions, and maintain user profiles—all through a simple and secure REST interface. ## Key Features * **User Management**: Create, retrieve, update, and delete users with unique identifiers * **Session Tracking**: Monitor active sessions with creation and last-seen timestamps * **Identity Verification**: Associate email addresses and phone numbers with user accounts * **Profile Management**: Store and update user profile information * **Webhook Integration**: Configure event notifications for real-time updates Prelude Auth helps you build robust authentication systems while offloading the complexity of session management, allowing you to focus on creating great user experiences. ### Why choose Prelude Auth? * **End-to-end onboarding control**: By managing both SMS OTP verification and session handling, Prelude provides enhanced anti-fraud capabilities with fewer false positives/negatives and better visibility throughout the onboarding process. * **Comprehensive behavioral analysis**: Our systems analyze the complete user journey, building stronger trust profiles and enabling more informed security decisions. * **Scalable architecture**: Designed to handle high traffic volumes without creating bottlenecks, ensuring your onboarding process remains smooth even during peak usage times. * **Developer-friendly simplicity**: Clean, intuitive REST endpoints with consistent response patterns reduce implementation complexity and accelerate development.