Requires token signature when refreshing tokens (#6)

keystone_client/client.py

@@ -369,6 +369,6 @@ def _refresh_tokens(self, force: bool = True, timeout: int = default_timeout) ->
         )
 
         response.raise_for_status()
-        refresh_payload = jwt.decode(self._refresh_token, options={"verify_signature": False})
+        refresh_payload = jwt.decode(self._refresh_token)
         self._refresh_token = response.json().get("refresh")
         self._refresh_expiration = datetime.fromtimestamp(refresh_payload["exp"])