`krane login` errors when command runs for the first time

When running `krane login` for the first time the CLI will error out with the following error

```
Error: ENOENT: no such file or directory, open '~/.krane/krane.config'
Code: ENOENT
```

On subsequent requests this command should work as the missing directory would have been created.

### How to fix
1. Always check if `~/.krane/krane.config` exists, if it doesnt exists then create it.

Start at the `krane login` command entry point and trace how `~/.krane/krane.config` is opened during a first run. Reproduce the command with no existing `~/.krane` directory, then verify that the directory and config file are created and login succeeds.

Written by the indexing model from the issue text.