Sharing credentials in hybrid install

Is there a proper mechanism for sharing aws credentials with a non-root OS user? All of the documentation for SSM threatens a bad time if you install SSM as non-root, but the only way to share the credentials requires adjusting access to not only /root/.aws/credentials, but also the /root directory itself, which seems like a bridge too far. Is there a way to get SSM to store the credentials in some other location that is easier to share with other OS users, or provide a set of credentials for a specific OS user as well?

Start by reviewing SSM credential handling and the non-root installation documentation referenced in the issue; no files or tests are named. Determine the supported way to make credentials available to a non-root OS user without exposing /root, and document or implement the agreed mechanism with coverage for the hybrid-install case.

Written by the indexing model from the issue text.