[MM3-users] changing secrets on a prod instance

I'm trying to sort how to properly change secrets of an already running setup. In particular I want to be able to change:

REST API user/password Hyperkitty API key Secret key

So far, after attempting to change REST API credentials I've got my setup failing on me.

Setup details: MM3 set up from maxking's docker images.

-- Sr System and DevOps Engineer SoM IRT