Add JWT example with @Guard decorator

[pie6k]

[lorefnon]

I have been working on an example application for personal evalation. It is very early prototype but features client-server JWT auth.

I plan to integrate hierarchical role based authorisation in near future.

[pie6k]

If you'd like to extract it from your app and create PR with example, that would be so awesome @lorefnon :)

[lorefnon]

Sure, will do.

I just realized that @Guard no longer exists in master. I will update my example to use @Before and create a PR shortly.

[pie6k]

Right. I've removed it as @Guard was simply not needed abstraction. It was simple function in form of

function Guard(options) {
  return Before(otherOptions)
}

as I think it's good approach to keep graphql more like library than framework, I've decided such Guard is bad abstraction.