In your OP you mention that you are selling "Huly", and I'm wondering if you meant "Hulu"?
You first week is critical, probably because you are accessing an account that you are unauthorized to do so. This would mean that your first few days of accessing the account are the most likely to get you caught on the hacked/cracked account. What you are selling here is not allowed, and you should stop before action is taken against you.
You claim that they have given permission to share their account, so then why is the "first week critical"? This wouldn't be the case if they were legitimately shared.