wha?

```
        whitelist = config['whitelist_keys'] ||= []
        whitelist.push(key)
        puts config.inspect
```
In console:

```
{"subnet"=>"127.0.0.0/24", "whitelist_keys"=>["65512f982ccd6f2c7d3ebbf92b0266da", "76b0ad0185d5acc7ff574750ae4f7dd7", "120d796c1a83a93f525e3698d4d7d3d3"]}
```