Next.js + PropelAuth Authentication Guide

A Next.js authentication tutorial demonstrates how to build an application with user signup, login, account management, social authentication such as Google login, passwordless magic links, and profile-picture uploads using PropelAuth. PropelAuth provides hosted and configurable authentication pages, transactional emails, optional two-factor authentication, user metadata collection, and B2B organization features, allowing developers to avoid implementing these systems themselves. The frontend integrates the `@propelauth/react` package through an AuthProvider, which manages authentication state, tokens, and user information, while React helpers and hooks enable conditional UI, login, signup, account redirects, and logout behavior. Authenticated frontend requests send bearer access tokens to Next.js API routes, where the `@propelauth/node` library validates JWT access tokens and retrieves user data, returning unauthorized responses when validation fails. The approach enables a Next.js application to securely identify users in backend operations, such as storing data associated with a user ID, with relatively little custom authentication code.

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