save secrets securely

> For your security, ensure that other users of your computer do not have read access to your credentials. On Unix-based systems you can do this with the following command:

> chmod 600 ~/.kaggle/kaggle.json

```
{"username":"XXX","key":"XXXXXXXXXXXXXXXXXXXXXXXXX"}
```

Why not save secrets securely using [pass](https://www.passwordstore.org/) or [keyring](https://pypi.org/project/keyring/)?

```
{"username-cmd":"pass ls kaggle/username","key-cmd":"pass ls kaggle/key"}
```