Day 10's password is one of the most mentioned words by the charavcters in Day 9 (especially Sal). Just read it again and you will surely find it (cuz ur missing out on the newest update which is AWESOME).
Funny fact: I found the password a little later that I wrote that comment (and, in my opinion, it was not so obvious, but I like challenges :D)
I must agree with you, the new update is really something (I already commented it in the proper section) :)
Im still stuck trying to find it, can I get a hint please
The only hint I can give you is that the password's meaning is, for short, the worst case scenario for Day 10.
Well... I couldn't say it better without spoiling the fun, hope you have found it
day 10 password is on day 10 thats why you get hints before the vault