Issues with Connected system

Certified Senior Developer

I am trying to build a portal to request Appian user account creation. From the interface I invoke an integration which in turn calls the webapi to trigger the process model to actually create Appian User. Individually each piece works fine from designer view. From the published portal however I am facing issue with the connected system. I created a service account and have mapped the API-Key in the CS. 

Further I tried skipping the CS and instead use Basic Auth with a system admin credentials but that throws an error that parameters aren't being passed.

Any help on what am I missing here?



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