How do I implement authentication in a NestJS application?

How do I implement authentication in a NestJS application?

To implement authentication in a NestJS application, you can use Passport.js along with JWT for token-based authentication.

Can you provide a basic example of how to set this up?

Sure! First, install the necessary packages: npm install @nestjs/passport passport passport-jwt jsonwebtoken. Then, create a strategy and a module for authentication.

What about user registration and login?

For user registration, create a user service to handle user data and a controller to manage the registration endpoint. For login, validate user credentials and issue a JWT.

How do I protect routes with authentication?

You can use guards in NestJS. Create an AuthGuard that checks for a valid JWT token before allowing access to protected routes.