How do i create `skipAuth` directives.

### What happened?
I am working on adding a skipAuth directives to queries that will render certain queries accessible to the public, provided the skipAuth directive is specified.

### What did you expect?

Referring to this document (https://gqlgen.com/reference/directives/), the directive operates subsequent to the authorization middleware. My goal is to find a strategy that facilitates the execution of the directive or checks if `skipAuth` is specified within the auth middleware before moving forward.

### Minimal graphql.schema and models to reproduce

```graphql
type Query {
gates: Gate! @skipAuth
}
```
### versions
- go run github.com/99designs/gqlgen version?
`v0.17.16`
- go version?
`go1.19.1 darwin/amd64`