React Next.js Firebase Node.js MongoDB Login Register System

Reuse a single form for login and registration, wired to Firebase authentication using email and password, with local context-driven state and post-login routing.

learn how to connect a node app to mongodb using atlas or a local installation, create a database user, whitelist ips, and use a connection string with mongoose.

Discover how middleware intercepts requests and responses, use next to continue, and apply app-wide middleware like cors and morgan, then adopt import-export syntax.

Move business logic into controllers, create a controllers folder, and export a request handler function to manage authentication, token verification, and user data flow between Firebase and the database.

Receive the frontend token in the backend, validate it with the Firebase admin tool, fetch the user data, and synchronize it with our database and context state for login.

Learn to use Firebase Admin in a Node.js server to verify tokens and manage users with a current user endpoint, using Axios to post the token.

Verify the token on the server with admin to retrieve the user, then fetch or create the user in MongoDB by email and return it to the frontend.

Learn to configure environment variables in Next.js to replace hard-coded values, enabling environment-specific API endpoints and token handling for development and production.

Define a Mongoose user schema with name, email, and picture, plus optional seller and stripe data, add timestamps, and save or fetch the user via the current user endpoint.

Implement a find-or-create user middleware that attaches the current user to the request object, enabling protected routes and consistent access across the app, regardless of login state.

Build a reset password page in a React Next.js app using Firebase to send a password reset link via email, integrated with login and registration flows.