* enhance: rate limit works without signed in user
* fix: make limit key required for limiter
As before the fallback limiter key will be set from the endpoint name.
* enhance: use limiter for signin
* Revert "CAPTCHA求めるのは2fa認証が無効になっているときだけにした"
This reverts commit 02a43a310f6ad0cc9e9beccc26e51ab5b339e15f.
* Revert "feat: make captcha required when signin to improve security"
This reverts commit b21b0580058c14532ff3f4033e2a9147643bfca6.
* fix undefined reference
* fix: better error message
* enhance: only handle prefix of IPv6
161659de5c