"create" command without name argument creates workspace named "undefined"

```
$ cloudev create
Creating undefined... done
    TypeError: The "path" argument must be of type string. Received undefined
    Code: ERR_INVALID_ARG_TYPE

$ cloudev ls
Fetching... done
Status    Name           Memory
� Up     axle-bot       44.39MiB / 31GiB (0.14%)
� Up     rdvuemobile    116.5MiB / 31GiB (0.37%)
� Up     undefined      23.64MiB / 31GiB (0.07%)
```