For the moment this is a singleton. One access key will let you stream
to any app or stream key. It's denoted in the form of appending a GET
parameter to the URL like `?access_key=foobarbaz`
This at least means someone who knows the stream URL (frex to view it)
won't also be able to stream.
10,000 hours mucking with `git filter-repo` and no reasonable use-case
found. On the plus side, anyone looking at this and curious what I nuked
isn't missing much. This lived in a monorepo up until about a week ago.
