allow command-line import to take a token as a parameter


### Observed behavior

Currently `importchannel` only takes channel IDs

### Expected behavior

Should also take tokens

### User-facing consequences

confusion and failure to properly import

### Errors and logs

```
HTTPError: 404 Client Error: Not Found for url: https://studio.learningequality.org/content/databases/dakup-ripad.sqlite3
```




### Context

0.10.0
