Either a dev was playing around and oopsied or they got hacked.
Also pre-emptive response to “something something about systems something cgpgrey”. At the end of the day we live in the real world with imperfections everywhere. Every system eventually boils down to trust in humans.
They do their testing and then hand over to deployment. After that they're out of the picture until the next update needs to roll out.
They can't have direct access to API keys for live apps in production.