Auth.js

Auth.js is a versatile and comprehensive authentication library designed to simplify the process of adding secure authentication to web applications. It provides a robust, free, and open-source solution that abstracts away much of the complexity involved in implementing various authentication strategies, including OAuth, email/password, and custom credentials. The core value proposition of Auth.js lies in its ease of integration and extensive provider support. Developers can quickly set up authentication with popular services like GitHub, Google, and many others with minimal code. Its modular design allows it to be used across different JavaScript frameworks, making it a flexible choice for a wide array of projects, from small personal sites to large-scale enterprise applications. It handles session management, token refreshing, and database persistence, providing a complete authentication backend out-of-the-box.