Updated examples

examples/src/Entities/UserEntity.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace OAuth2ServerExamples\Entities;
+
+use League\OAuth2\Server\Entities\Interfaces\UserEntityInterface;
+
+class UserEntity implements UserEntityInterface
+{
+    /**
+     * Return the user's identifier
+     * @return mixed
+     */
+    public function getIdentifier()
+    {
+        return 1;
+    }
+}