Fix flake8 W605

app/__init__.py

@@ -36,7 +36,7 @@ def create_app(config_name):
 
         user = {
             "username": re.search(
-                "([^!]+?)(@uab\.edu)?$", request.headers.get("Persistent-Id")
+                r"([^!]+?)(@uab\.edu)?$", request.headers.get("Persistent-Id")
             ).group(1),
             "fullname": (
                 f"{request.headers.get('Givenname')}"