Block access to admin.php by IP address in NGINX (Laravel Forge)

nginx.conf

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/www.example.com/before/*;

server {
    location /admin {
        allow 123.456.789.001; # your ip here

        deny all;

        try_files $uri $uri/ /index.php?$query_string;
    }

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }
}

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/www.example.com/after/*;