If a user creates a post locally, while not logged in (authenticated). Then later authenticates, they can not delete the previously created local post.
The CLI does not report any error, which leads the user to believe the post was deleted. However on running `writeas posts`, `list` in previous versions, the post remains. In fact visiting the URL does confirm it still exists.
The CLI should actually delete the post from the server as well as remove the line from the `posts.psv` file.
If there is some error along the way it should be reported back to the user.