Next line returns 200 as status https://github.com/Kong/kong/blob/c817fada7a514d84f6e0aab7461605c71bf3a841/kong/plugins/cors/handler.lua#L13

Internet says it should return 204:

• https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request
• https://docs.microsoft.com/en-us/aspnet/core/security/cors?view=aspnetcore-3.1#preflight-requests

Internet changed its mind since 2018 https://

I found that some admin API provided by apisix are not found in any documentation, such as
/apisix/admin/plugins/list, so do we need a doc to keep track of the admin API that is nowhere to put?

Since maxmind no longer provides the legacy GeoIP databases could it might be possible to update the nxtool to use GeoIP2?

In lieu of #283, implement Stackdriver Canary Analysis for use in GKE.

Percona is quite strict on having primary keys on all tables (and rightly so).
Please add primary keys to all tables, even if it's just an auto-increment.

It's mostly just the following tables:
authentication_logs (could just get a auto-increment primary key added)
identity_verification_tokens (could just set the token as primary key)