Automatically login to AWS SSO

When I run a command like sls info --stage dev --aws-profile sso sls responds with

```
AWS credentials missing or invalid. Original error from AWS: The SSO session associated with this profile has expi
red. To refresh this SSO session run aws sso login with the corresponding profile.
```

sls v3 with the better-credentials plugin would prompt at this point, opening a browser.

At the moment I have to jump out of my sls flow, manually run the aws CLI, and then return.

Could Sls v4 just do that like it used to ?