def get_zero_times(token, amount = 1, interval = 30)
  amount = amount.to_i
  return [] if amount <= 0

  password_lib = ROTP::TOTP.new(token)

  time = Time.now
  zero_times = []

  while(zero_times.size < amount)
    code = password_lib.at(time, true)
    if code.starts_with?('0')
      zero_times << time
    end

    time += interval.seconds
  end

  zero_times
end