check if configuration is cached

Author: taylorotwell

src/PassportServiceProvider.php

@@ -78,14 +78,13 @@ protected function registerMigrations()
      */
     public function register()
     {
-        $this->mergeConfigFrom(__DIR__.'/../config/passport.php', 'passport');
+        if (! $this->app->configurationIsCached()) {
+            $this->mergeConfigFrom(__DIR__.'/../config/passport.php', 'passport');
+        }
 
         $this->registerAuthorizationServer();
-
         $this->registerResourceServer();
-
         $this->registerGuard();
-
         $this->offerPublishing();
     }