`already_in_team` not reflected in frontend?

So, I was experimenting with the current master branch and I tried to register using my email which I already have an account for.

In the frontend there's nothing shown. In the backend logs I see:

```
2019-11-23T09:45:53.061928+00:00 app[web.1]: 2019-11-23T09:45:53.061Z slackin:invite Error sending an invite to foo@gmail.com: already_in_team
```

Is this normal?
