Look as I might, I can not find a thread related to failed SQL Logins.
My gut tells me it is on our end, but I'm not totally conviced.
I've been Admining SharePoint for a long time and am not sure why a service account can be used to do the add-on install, but not be used to query data from the the created DB.
This is a development instance, so I only use one service account throughout.
Any assistance would be greatly appreciated. I don't mind finding out I missed something in the install. After being in IT for 30 years, I have no pride. 
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