Setting Global Environmental Variables for Content Hosted on RStudio Connect

I have RStudio Connect installed on an AWS EC2 with at least 50 deployed applications. In many of our older applications, we stumbled into the bad practice of keeping sensitive data (i.e. database connections, passwords) in the application code. We've smartened up, and are moving this sensitive data into environmental variables, but it's a pain to need to set the environmental variables for each individual app, especially because 99% of these apps will use the same credentials.

Is there a best way to set these environmental variables globally for all content hosted on RStudio Connect?