Is it possible to customise how the user IP is retrieved?

[denizaygundev]

Due to Vercel restrictions, the X-FORWARDED-IP header is unavailable (it obfuscates the user's IP to a random AWS IP), so we want to the user IP via a different header however then the authentication-log package cannot pick it up, even when we add the real user IP to the left most value of the X-FORWARDED-IP the authentication-log package fails to pick it up because I think getClientIp that's being used relies on the SERVER_ADDR or REMOTE_ADDR header instead?

[lrljoe]

I have a series of updates for this that I'll merge in ASAP!