❓ Help Cafe timer code vb.net/mysql

[EJAYYY]

help naman po about sa coding. paano po yung mag log in si user tas may specific na time na madededuct tapos pag naglog out mafrifreeze yung time nya tas masasave po sa database. parang computer shop po sya kaso sa school lang po gagamitin. sana po may makahelp sakin, salamat po in advance.