jwt

src/auth/auth.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { AuthController } from './auth.controller';
+
+describe('AuthController', () => {
+  let controller: AuthController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [AuthController],
+    }).compile();
+
+    controller = module.get<AuthController>(AuthController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});

src/auth/auth.controller.ts

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+
+import { Body, Controller, Post, HttpCode, HttpStatus } from '@nestjs/common';
+import { AuthService } from './auth.service';
+
+@Controller('auth')
+export class AuthController {
+  constructor(private authService: AuthService) {}
+
+  @HttpCode(HttpStatus.OK)
+  @Post('login')
+  signIn(@Body() signInDto: Record<string, any>) {
+    return this.authService.signIn(signInDto.username, signInDto.password);
+  }
+}

src/auth/auth.module.ts

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+
+import { Module } from '@nestjs/common';
+import { AuthService } from './auth.service';
+import { UsersModule } from '../users/users.module';
+import { JwtModule } from '@nestjs/jwt';
+import { AuthController } from './auth.controller';
+import { jwtConstants } from './constants';
+
+@Module({
+  imports: [
+    UsersModule,
+    JwtModule.register({
+      global: true,
+      secret: jwtConstants.secret,
+      signOptions: { expiresIn: '60s' },
+    }),
+  ],
+  providers: [AuthService],
+  controllers: [AuthController],
+  exports: [AuthService],
+})
+export class AuthModule {}

src/auth/auth.service.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { AuthService } from './auth.service';
+
+describe('AuthService', () => {
+  let service: AuthService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [AuthService],
+    }).compile();
+
+    service = module.get<AuthService>(AuthService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

src/auth/auth.service.ts

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+
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { UsersService } from '../users/users.service';
+import { JwtService } from '@nestjs/jwt';
+
+@Injectable()
+export class AuthService {
+  constructor(
+    private usersService: UsersService,
+    private jwtService: JwtService
+  ) {}
+
+  async signIn(
+    username: string,
+    pass: string,
+  ): Promise<{ access_token: string }> {
+    const user = await this.usersService.findOne(username);
+    if (user?.password !== pass) {
+      throw new UnauthorizedException();
+    }
+    const payload = { sub: user.userId, username: user.username };
+    return {
+      access_token: await this.jwtService.signAsync(payload),
+    };
+  }
+}

src/auth/constants.ts

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+export const jwtConstants = {
+    secret: 'DO NOT USE THIS VALUE. INSTEAD, CREATE A COMPLEX SECRET AND KEEP IT SAFE OUTSIDE OF THE SOURCE CODE.',
+  };
+