How do I allow a user to purchase an expiring passcode to access part of my website, from my online store, similar to pay-per-view?

How do I allow a user to purchase an expiring passcode to access part of my website, from my online store, similar to pay-per-view?

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)