oking JWTs

In this example we will validate JWT claims by checking the JWT sub (Subject) claim value has not
been revoked. This this example only the sub claim `bobby@example.com` is revoked

**Step 1:** Move into folder with the nested JWT claims and cat the file for inspection

```bash
$ cd /etc/nginx/jwt/hs256/nested_jwt
$ ls

expired_token_nested.jwt  invalid_token_nested.jwt  valid_token_nested_1.jwt  valid_token_nested_2.jwt
```

**Step 2:** Run a curl command inserting a valid JWT (`valid_token_nest