It looks like I'm about to refinance my Auto Loan through APCU, and noticed it wasn't supported here. I searched the foums, and no one mentioned them as far as I saw. I thought making a request to support them would be worthwhile, even though I do not yet have an account (I sent in my closing paperwork yesterday).
Website: https://www.apcu.com/
This is not a high priority thing for me, it's just a 'would be nice' thing.