I was quite disappointed when I couldn't find a place to adjust the charge rate. However, while waiting at a drive through I messed around a notice that under the charge time setting there is a place to lower the charge current. It is very rudimentary as in it has only three settings, maximum, low, and minimun, but it may suit my needs and not have to get an adjustable esve.
Actual charge rate percentage differentials should be similar to this : https://insideevsforum.com/community/index.php?threads/rv-adapter.6247/page-3#post-76763
That wasn't the error I was getting. It is working just fine now without me doing a thing. It said something like I didn't have the authority to do that action.