Comment 1 for bug 1734725

So juju should not be changing the region underneath a user. If the user has specified a specific region that doesn't match the credential, juju should warn them.

Secondly, locking a credential to a specific region is currently intentional, though perhaps that's not a sane default. IMHO, this is largely a usability issue. It would seem a saner default might be to simply warn the user the credential and region doesn't match, and if it fails, the user should understand why given the warning. By default it seems most users wouldn't be using region locked credentials (and then explicitly asking for a different region!). Juju should just attempt to do what the user has requested.