v2 API

It seems ETF2L's v2 api docs dont actually exist, and they want you to just use the v1 docs for the most part.
No idea what they are doing over there, we will probably add our own abstraction on top of theirs if we run into issues with it

v2: https://api-v2.etf2l.org/#
v1: https://api.etf2l.org/