Documentation doesn't seem correct

[slott56]

This:

%%plantuml auth

gets an error.

This, on the other hand,

%%plantuml --jar 

@startuml auth
etc.

works, but, the image returned to the notebook by the magic is the temp name, not the given name, resulting in a file-not-found.

Using iplantuml 0.1.1 with jupyterlab 2.2.6 and Python 3.9.5.