Cannot use DiskTokenStorage default implementation

[marciok]

Hello,
I'm a rustacean newbie, and I'm trying to authenticate using DiskTokenStorage.

let auth = Authenticator::new(&secret, MyDelegate,
                                  hyper::Client::new(),
                                  DiskTokenStorage::default(), 
                                  Some(oauth2::FlowType::InstalledInteractive));

However, I get the error: "No such file or directory". I looked at the source code, and couldn't locate where the default location is being set. Let's say if I want to create a new DiskTokenStorage passing a custom location, I would have to implement the TokenStorage trait again, which it feels unnecessary.

I'm probably doing some trivial mistake, but I cannot find it where.

Many thanks!

[marciok]

Ups.. I was instantiating a new DiskTokenStorage::new(..) but I was forgetting the unwrap the returned value.