Prevent Extra hours

[derekwan1]

1. Prevent multiple checkins. Sometimes people write their passwords on the board, and AI's check themselves in multiple times.
2. Prevent checking in for sections that give more hours. For example, some AI's checkin for guerrilla section (3hr) or lab (1.5hr) at office hour (1hr)
3. Auto-update TA's secret word each week if he/she doesn't do so herself. Browsers save passwords, including on the AI console

[shaynak]

working on these

[colinschoen]

Great. Let me know if you have any questions.