Invalid CREDENTIALS_SERVICE_USERNAME in lms/envs/common.py

[justinhynes]

Originally reported by https://github.com/Silidrone, please see: openedx/edx-platform#34271

Hi,

I believe this is a BUG.

I am using tutor 17.0.0
Freshly set up credential fails to generate program certificate with the following error:

Failed to create a credentials API client to award program certificates

(for reference, it fails in openedx/core/djangoapps/programs/tasks.py on line 232, where CREDENTIALS_SERVICE_USERNAME is used as a parameter to get_credentials_api_client)

After some investigation, I figured out this is because the CREDENTIALS_SERVICE_USERNAME is currently incorrectly set in lms/envs/common.py. Currently it is set as credentials_service_user but when I change it to credentials only, my program certificate gets generated successfully.

[regisb]

Indeed, this looks like an obvious bug. @Faraz32123 can you please have a look?