Syntax error

jupyter/base/values/values.yaml

@@ -10,7 +10,9 @@ hub:
     pvc:
       storageClassName: csi-sc-cinderplugin
   extraFiles:
-    refresh-token.py: |
+    refresh-token.py: 
+      mountPath: /usr/local/etc/jupyterhub/refresh-token.py
+      stringData: |
         """A token refresh service authenticating with the Hub.
 
         This service serves `/services/refresh-token/`,
@@ -167,7 +169,7 @@ hub:
       c.JupyterHub.services = [
           {
               'name': 'refresh-token',
-              'command': [sys.executable, './refresh_token.py']
+              'command': [sys.executable, '/usr/local/etc/jupyterhub/refresh-token.py']
           }
       ]