Hi,

According to the github documentation, the API return on /user is different when the user is authenticated through OAuth without the user scope from when it is authenticated with the user scope.
https://developer.github.com/v3/users/#get-the-authenticated-user

But the library seems to handle only users with the user scope.

When the user scope is not used, the api returns fewer fields: for instance, the disk_usage field is not returned, and when trying to load the return into an AuthenticatedUser here:

I get the following error:

IncompleteResponse: None The library was expecting more data in the response (KeyError('disk_usage',)). Either GitHub modified it's response body, or your token is not properly scoped to retrieve this information.

I think this function should not always try to load the result into an AuthenticatedUser, but first check the fields of the API's response and try to load a User if some fields are missing.

Because of this behavior, we have to keep using the version 1.0.0a4 and cannot upgrade to version 1.0.1

If you think this is a valid issue, I can work on a pull request to fix it.

Thanks