diff --git a/flask_example/app.py b/flask_example/app.py
index 3e32b8d..89d5d52 100644
--- a/flask_example/app.py
+++ b/flask_example/app.py
@@ -15,7 +15,24 @@
 
 app = Flask(__name__)
 app.config.from_pyfile('config.py')
-oauth = OAuth(app)
+
+
+class Cache(object):
+    def __init__(self):
+        self._data = {}
+
+    def get(self, k):
+        return self._data.get(k)
+
+    def set(self, k, v, timeout=None):
+        self._data[k] = v
+
+    def delete(self, k):
+        if k in self._data:
+            del self._data[k]
+
+
+oauth = OAuth(app, Cache())
 
 
 @app.route('/')