If you have many modules with such data (really password in modules? I'm sure you are aware already of this..)

I wanted something quick that wouldn't involve me putting credentials into the scripts themselves .. and would also allow the credentials to be shared between multiple scripts. Putting them in a module that wasn't covered by version control seemed to be the easy solution.

In hindsight, a better way would have been to create a credentials module that would do a lookup in a JSON configuration file .. just so I don't have to copy the four lines of code to open, read and transform JSON into a Perl data structure. That's for the future, I guess.

Anyway, I have a solution that works fine right now. Thanks for the feedback.