"NestJS authentication in 5 minutes"

Gajendra Singh — Sun, 31 May 2026 08:00:58 +0000

NestJS Authentication in 5 Minutes 🔐

Authentication in NestJS sounds complicated at first…

But the actual flow is surprisingly simple 👇

User Login
↓
Verify Credentials
↓
Generate JWT Token
↓
Protected Routes
↓
Validate Token

1️⃣ Install required packages

npm install @nestjs/jwt @nestjs/passport passport passport-jwt bcrypt
npm install -D @types/passport-jwt

2️⃣ Generate auth files

nest g module auth
nest g service auth
nest g controller auth

3️⃣ Configure JWT (`auth.module.ts`)

@Module({
  imports: [
    JwtModule.register({
      secret: "super-secret-key",
      signOptions: {
        expiresIn: "1d",
      },
    }),
  ],
})
export class AuthModule {}

4️⃣ Create login function (`auth.service.ts`)

@Injectable()
export class AuthService {
  constructor(
    private jwtService: JwtService,
  ) {}

  async login(user: any) {
    const payload = {
      id: user.id,
      email: user.email,
    };

    return {
      access_token:
        this.jwtService.sign(payload),
    };
  }
}

5️⃣ Protect routes with JWT

@UseGuards(AuthGuard("jwt"))
@get("profile")
getProfile(@Request() req) {
return req.user;
}

Authentication = Login → Token → Verify → Access 🔥

⚠️ Bonus tip: Never store passwords directly. Use:

bcrypt.hash()
bcrypt.compare()

What confused you most when learning authentication? 👇

5 Micro-Habits That Will Make You a Better Developer

Gajendra Singh — Thu, 28 May 2026 19:33:59 +0000

Hey DEV community! 👋

We all know the tech landscape moves fast. Trying to learn everything at once is a fast track to burnout.

Instead of planning massive 4-hour study sessions that never happen, try building these 5 micro-habits into your daily routine:

1. The 15-Minute Read 📖
Read one technical article or documentation page every morning with your coffee.

2. Read Code, Don't Just Write It 🔍
Spend 10 minutes looking at open-source repositories or a teammate's pull request. You'll catch new patterns.

3. Break Your Code on Purpose 🛠️
Change a variable, delete a line, and see exactly how the error message reads. Understanding failures makes you a faster debugger.

4. Document as You Go 📝
Write down why you made a specific architectural choice in a scratchpad. Future you will thank you.

5. Teach What You Just Learned 🧑‍🏫
Explain a complex concept to an AI, a rubber duck, or write a quick 200-word post right here on DEV.

Consistency beats intensity every single time.

👇 What is one small habit that completely changed your workflow? Let’s discuss in the comments!

DEV Community: Gajendra Singh