useEffect(() => {
    if (mainPageLink === '') {
      (async () => {
        await appLogin();
        const paths: Record<UserRole, string> = {
          STUDENT: '/student-main-page',
          LECTURER: '/lecturer-main-page',
          TRAINING_REPRESENTATIVE: '/training-representative-main-page',
        };
        const { appRole } = user;
        setMainPageLink(paths[appRole]);
      })();
    }
  });