dstask import-tw or dstask-import tw?

[devhell]

Hi,

Love this project, thank you very much for it. Using git as a backend is such a good idea! I have been using taskwarrior until now and was looking at manually importing all my tasks when I notice the mentioned import mechanisms. I'm not clear if there's a difference between them, or if there's a preference for one over the other. Also, it seems that the import is not working, with either, from a taskwarrior (v2.6.0) export.

Using dstask import-tw export.json I receive: No tasks found. Run 'dstask help' for instructions.
Using dstask-import tw < export.json I receive: failed to decode JSON from stdin

Any hints welcome :)