miscellaneous updates

.env.example

@@ -20,7 +20,7 @@ DB_CONNECTION=mysql
 DB_HOST=localhost
 DB_PORT=3306
 DB_DATABASE=
-DB_USERNAME=root
+DB_USERNAME=
 DB_PASSWORD=
 
 CACHE_STORE=database
@@ -32,7 +32,12 @@ SESSION_LIFETIME=120
 BROADCAST_CONNECTION=log
 FILESYSTEM_DISK=local
 
+AUTH_MODEL=Modules\Admin\App\Models\User::class
+
 MEMCACHED_HOST=127.0.0.1
+MEMCACHED_PORT=11211
+MEMCACHED_USERNAME=null
+MEMCACHED_PASSWORD=null
 
 REDIS_HOST=127.0.0.1
 REDIS_PASSWORD=null