which does work but for some reason, the key field is not returned in the response. I’ve also tried to the retrieve the single key with it’s ID and with a field_mask=key but that doesn’t work as well.
The field mask is to add additional fields to whatever the API deems is normal to return for a command - so you will get some fields back that you may not want.
So it may be a bit of a redundant request and actually causing the API some issues. Try it without, let me know how you get on, if not I’m happy to have a go as it’s on my todo list for my custom console.