not many methods, but i think you mean an authentication trait, however i prefer to opt for an authentication interface which is better suite in this case because it is not just about providing methods to save locs but to enforce implementation of certain methods. This third interface would be however justified when the number of interfaces using it is more than 2 and currently that number is exactly 2, so for now we are good. If we add another XTracker that is not an issue tracker or a pull request handler, then we should add this authentication interface. But for now it is not the case.