I was able to follow along... why couldn't you?

Situation - Senior Center has a computer lab with 14 computers. You can be a "club" member, pay a fee and have access to the computers. This requires knowing the password. You can also be a guest, and pay a daily or per-use fee. This also requires knowing the password.
Problem - Club member can give non-member the password. Said non-member can then use computers for free.
Additional problem - lab monitor isn't exactly computer literate. Also, having to go around changing the passwords on 14 computers everyday is something of a hassle. So there's an automated process to update the password daily. The OP then had an app that would discover the password, and email it to the admin person... again... remember, they're not necessarily computer literate... problem is that the password discovery & email app no longer works.

I'm not sure what the solution is... except for maybe the app be responsible for changing the password and email it out... rather than trying to discover it.

-tg