Adding authorization with Conventions

Hello, is there any example of using the graphql-dotnet/authorization with this package? I would really like to use these together, but can't figure them out.

The two things I'm stuck on:
1. My query is marked with [ImplementViewer(OperationType.Query)]. With this, I try and mark my endpoint with [GraphQLAuthorize()], and it seems completely ignored. It does not apply the policy requirement to the endpoint.

2. How do you add an IProvideClaimsPrincipal? I'm confused on the difference between the IUserContext, and IProvideClaimsPrincipal. Do they go on the same object? I assumed yes, however following the authorization tutorial, they do https://github.com/graphql-dotnet/authorization/blob/master/src/Harness/Startup.cs#L66 which you not do with this package, so I don't know how to add the User from HttpContext.

Any help would be appreciated, thank you