nestjs process.env.variable is undefined in my auth.module.ts - nestjs

Question

im trying to test jwt auth in nestjs.
when i called jwtService.sign();
it shows error secretOrPrivateKey must have a value - {}
secret is undefined.
but in AuthController, porcess.env.JWT_SECRET_KEY is work.
i dont know why it is not work.
how can i fix it ?
auth.module.ts
#Module({
imports: [
ConfigModule.forRoot({
isGlobal: true,
load: [AppConfig, MySqlConfig, OracleConfig],
envFilePath: `${process.env.NODE_ENV}` == '' ? '.env.dev' : `.env.${process.env.NODE_ENV}`,
validationSchema: Joi.object({
NODE_ENV: Joi.string()
.valid('dev', 'stg', 'prd'),
}),
}),
AuthModule,
],
controllers: [AppController],
providers: [AppService, Logger],
})
export class AppModule {}
app.module.ts
#Module({
imports: [
PassportModule,
JwtModule.register({
secret: process.env.JWT_SECRET_KEY,
signOptions: { expiresIn: '1d' },
}),
],
controllers: [AuthController],
providers: [AuthService, JwtStrategy, LocalStrategy],
exports: [AuthService],
})
export class AuthModule {}
main.ts
async function bootstrap() {
const app = await NestFactory.create(AppModule, {
bufferLogs: true,
});
app.enableShutdownHooks();
app.useLogger(app.get(MyLogger));
const configService = app.get(ConfigService);
const logger = app.get(MyLogger);
const config = new DocumentBuilder()
.setTitle('nestjs-tst-boilerplate')
.setDescription('The nestjs-tst-boilerplate API description')
.setVersion('0.0.1')
.addTag('tag')
.build();
const document = SwaggerModule.createDocument(app, config);
SwaggerModule.setup('api', app, document);
await app.listen(configService.get<number>('app.port'));
logger.log(`Application running on [${configService.get<string>('app.env')}] enviroment. ${await app.getUrl()}`);
}
bootstrap();

Answer 1

at the time that process.env.JWT_SECRET_KEY is read, the .env might not be parsed yet. Thus, don't rely on process.env. if you're using some module like #nestjs/config. Use the async version of JwtModule.register instead and inject the ConfigService. See: https://github.com/nestjs/jwt/blob/master/README.md#async-options