Ensure refresh token is stored

[rikroe]

Proposed change

If an exception occured (e.g. connection issue or remote service issue), a new refresh_token was not saved to disk in CLI.
This PR ensures that tokens are saved.

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to this library)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:

Checklist

• The code change is tested and works locally.
• Tests have been added to verify that the new code works.