refactor: use variable

Cannot find this code from the recordActiveDate() method definition on IDE.

Author: kenjis

src/Filters/TokenAuth.php

@@ -48,7 +48,7 @@ public function before(RequestInterface $request, $arguments = null)
         }
 
         if (setting('Auth.recordActiveDate')) {
-            auth('tokens')->recordActiveDate();
+            $authenticator->recordActiveDate();
         }
     }