User management

[MattIPv4]

Description

Allow users to be automatically flagged or banned based on the number of invalid PRs that they have. Provide a management ability for Hacktoberfest moderators to be able to manually ban or unban someone.

Test process

TBD.

Requirements to merge

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[MattIPv4]

A flaw with the auto-ban, it will re-ban a user if a moderator manually unbans them. Needs to be fixed before this can go to prod.