Creating api to link CMOD documents to another app. Anyone making the call from app would use the same hardcoded user and password. Is there repercussions with this setup? Performance, limit of login with same user, etc...
Nope. Many web-facing 'portals' to documents in CMOD use a single user.
Just make sure you're using the Java API -- I had a customer last year who was still using the CGI interface to CMOD, and it was a source of endless headaches, and more than one Sev 1 outage.
-JD.