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kotlinlang

I have a header that needs to be passed on _every_ single request. I’m using a `Filter` right now to validate it, but I also want to put it on the OpenAPI contract for each route. It looks like the only way for me to require that header on every route is to copy-paste the contract header checks?

oh nevermind, this is perfect!

```
package org.http4k.contract

import org.http4k.core.Filter
import org.http4k.core.Method.OPTIONS
import org.http4k.core.Request
import org.http4k.core.Response
import org.http4k.core.Status.Companion.UNAUTHORIZED
import org.http4k.lens.Lens
import org.http4k.lens.LensFailure


/**
 * Endpoint security. Provides filter to be applied to endpoints for all requests.
 */
interface Security {
    val filter: Filter
}
```

```
class AuthSecurity(authFilter: (RequestContexts) -&gt; Filter, contexts: RequestContexts) : Security {
        override val filter = authFilter(contexts)
    }
```
:smile: