I am using appcfg.py to upload data to datastore from a csv file.
But every time I try, I am getting error: 

```

[info    ] Authentication failed

```

even if i am using Admin id and password.  

In my app.yaml file I am having:

```

handlers:
- url: /remote_api
  script: $PYTHON_LIB/google/appengine/ext/remote_api/handler.py
  login: admin

- url: .*
  script: MainHandler.py

```

Can anybody please help me?
Thanks in advance.