token not loaded when login is Successfully

i'm ussing this [config](https://github.com/harababurel/gcsf/blob/master/sample_config.toml) with my client-id
```
$ gcsf login some_session_name
Please direct your browser to https://accounts.google.com/o/oauth2/auth?scope=https://www.googleapis.com/auth/drive&redirect_uri=http://localhost:8081&response_type=code&client_id=205948887-i5hr38hkdq6usbhgbi9qbdhsa6l0nm08.apps.googleusercontent.com and follow the instructions displayed there.
Successfully logged in. Saved credentials to "/root/.config/gcsf/some_session_name"
```
```
$ gcsf mount /mnt/gcsf -s some_session_name
ERROR gcsf > Token file "/root/.config/gcsf/some_session_name" does not exist.
ERROR gcsf > Try logging in first using `gcsf login`.
```