Documentation for how to use lockout key

There is an abstract description of what the dripline lockout here: https://driplineorg.github.io/dripline/branches/dl3_develop/Use-Protocol.html#lockout

However, I didn't find it enough for me to figure out how to actually implement it in a data taking script. And there doesn't seem to be an example anywhere.

Can the documentation provide a minimal example?

Here is something of a minimal example I'm trying to get to work:

```
dl-agent ... cmd peaches lock
somehow grab the lockout_key
dl-agent ... -k lockout_key set peaches 25
dl-agent ... -k lockout_key cmd peaches unloack

```