Prevent easily-guessed pin codes

[brittag]

What type of user is this for? (applicant/member/voting member/admin)

Members

Description

We should require the most secure pin codes that we can for our new door. We should have a blacklist that disallows using common code patterns like 1111111, 1212121, etc., and discourage people from using their phone number as their code.

We may be able to reuse an existing blacklist, since there's existing research on this: https://arxiv.org/abs/2003.04868

Screenshots of current behavior, if any

We didn't have any systematic process for preventing easily-guessed codes at our old space, since that was a lower-risk situation.

[brittag]

Entered a set of blacklisted codes, enabled by #598!