## About The Pull Request
- Var `on_station` is no longer sent to the UI as it is redundant with
`all_products_free`. Saved bandwidth
- Dispensing free returned products no longer produces logs of 0 credits
into the economy
- Removed excess null checks for account stuff
## Changelog
🆑
code: improved code for vending machine payment process
fix: stop logging 0 credit purchases when vending machines are
dispensing returned products
/🆑
a4ac8312f3