How to get the configurations from within a module import in NestJS?

You have to use registerAsync, so you can inject your ConfigService. With it, you can import modules, inject providers and then use those providers in a factory function that returns the configuration object:

JwtModule.registerAsync({  imports: [ConfigModule],  useFactory: async (configService: ConfigService) => ({    secretOrPrivateKey: configService.getString('SECRET_KEY'),    signOptions: {        expiresIn: 3600,    },  }),  inject: [ConfigService],}),

For more information, see the async options docs.

Or there is another solution, create an JwtStrategy class, something like this:

@Injectable()export class JwtStrategy extends PassportStrategy(Strategy) {    constructor(private readonly authService: AuthService) {        super({            jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),            secretOrKey: config.session.secret,            issuer: config.uuid,            audience: config.session.domain        });    }    async validate(payload: JwtPayload) {        const user = await this.authService.validateUser(payload);        if (!user) {            throw new UnauthorizedException();        }        return user;    }}

There you are able to pass ConfigService as a parameter to the constructor, but I'm using config just from plain file.

Then, don't forget to place it in array of providers in module.

Regards.