find the error...

authenticate.ts

/**
 * Checks if the provided credentials are correct and returns corresponding
 * employer entity
 *
 * @throws 404 NotFound Exception (email not found)
 * @throws 401 Unauthorized Exception (email and password combination wrong)
 * @param email
 * @param password
 */
async validateCredentialsEmployer(
  email: string,
  password: string,
): Promise<Employer> {
  let employer: Employer;
  try {
    employer = await this.employerRepository.findOneOrFail({ email: email });
  } catch (error) {
    throw new NotFoundException();
  }
  const valid = bcrypt.compare(password, employer.passwordHash);
  if (!valid) {
    throw new UnauthorizedException();
  }
  return employer;
}