How to add dimensions in FlexUnits

I would like to add a dimension (say, for example, Money) in FlexUnits, and define a base unit for it (say EUR). I have searched in the doc and online, but I can’t seem to find how to do that. Could someone point me to a tutorial? In case it clarifies what I am trying to do, here is what I am using with Unitful: module MyUnits using Unitful @dimension MU "MU" MonetaryUnit false @refunit EUR "EUR" Euro MU true end Unitful.register(MyUnits) using .MyUnits # I can then do things like cu = 1u"EU...