Restrict Access to /if/admin

[millaw73]

Hi all,
Really need help.

• How can I allow all traffic to flow through to: xttps://auth.authdomain.xx/if/user**,
• But restrict access to: xttps://auth.authdomain.xx/if/admin ONLY to a given IP address?

If use the entry below in the "Advanced" tab, it blocks the /if/admin which is good, but I'd rather allow access to a given IP and block the rest.
location /if/admin {
return 404;
}

I'm running an Authentik instance which I'd rather the admin access is restricted to home IP only.