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import { LocalStrategy } from './strategies/local.strategy';

@Module({
imports: [
UsersModule,
PassportModule,
JwtModule.register({
secret: jwtConstants.secret,
signOptions: { expiresIn: '60s' },
}),
],
providers: [AuthService, LocalStrategy],
exports: [AuthService],
})
export class AuthModule {}

src/auth/auth.service.ts
import {
HttpException,
Injectable,
UnauthorizedException,
} from '@nestjs/common';
import { JwtService } from '@nestjs/jwt';
import { UsersService } from '../users/users.service';
import { PostSignupDTO } from './dto/post-signupDTO';
import * as bcrypt from 'bcrypt';

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

async validateUser(username: string, password: string): Promise<any> {
const user = await this.usersService.findOne(username);
if (!user) throw new UnauthorizedException();
const valid = await bcrypt.compare(password, user.password);
if (!valid) throw new UnauthorizedException();
return true;
}

async login(user: any) {
const payload = { username: user.username, sub: user.userId };