Refactor for better readability (#4529)

Move to method to get user_id

Author: nookala

middleware/base_rate_limiter.rb

@@ -103,7 +103,7 @@ def call(env)
         rate_limit_headers = RateLimitHeaders.new(@header_suffix)
 
         if apply_rate_limiting?(env)
-          user_guid = user_token?(env) ? env['cf.user_guid'] : client_ip(ActionDispatch::Request.new(env))
+          user_guid = get_user_id(env)
 
           count, expires_in = @expiring_request_counter.increment(user_guid, @reset_interval, @logger)
 
@@ -118,6 +118,10 @@ def call(env)
         [status, headers.merge(rate_limit_headers.to_hash), body]
       end
 
+      def get_user_id(env)
+        user_token?(env) ? env['cf.user_guid'] : client_ip(ActionDispatch::Request.new(env))
+      end
+
       private
 
       def apply_rate_limiting?(_env)