Title says it all. I don’t see how this.authService could possibly be undefined after this.authService = new AuthService() in the constructor (or something incredibly close). The base class uses a base class of GenericApiService – why I have to use the const and pass to super before assignment.

export class AuthController extends CrudController<any> {
  authService: AuthService;

  constructor(app: Express) {
    const authService = new AuthService(database.db!);
    super('auth', app, authService);

    this.authService = authService;
  }

  registerUser(req: Request, res: Response, next: NextFunction) {
    // TS2532: Object is possibly undefined
    this.authService.createUser(orgId, req.body)
      .then((doc) => {
        return res.status(201).json(doc);
      })
  }