Running custom report as a different user produces no results

I'm pulling my hair out here, so I'm giving up and asking for help since I'm only doing the same things over and over and expecting a different result, the definition of insanity :) 

Back story, I'm trying to pull a report out with the API - and I can do so with my credentials through the API - however, I don't want my credentials stored in code.  So I've created a new user that authenticates against TDX instead of our AD and given that user the exact same license type, security role and permissions as my login.  However when trying to access the report through the API with this new user, I get no results.  So I logged into TDX with the new user and run the report within TDX and same thing, no results.  I've assigned the visibility of the report to myself and the group I put the new API user in so I really don't know what else I am doing wrong and hopefully someone can help before I go lay down in traffic (ok that was overly dramatic).  

Thanks,

Chris-