Feature

companion object Feature : 
    ApplicationFeature<Application, Configuration, Authentication>

Installable feature for Authentication.

AuthenticatePhase	`val AuthenticatePhase: PipelinePhase` Authenticate phase in that authentication procedures are executed. Please note that referring to the phase is only possible after feature installation.
ChallengePhase	`val ChallengePhase: PipelinePhase` Authenticate phase in that auth provider’s challenges performing. Please note that referring to the phase is only possible after feature installation.
key	`val key: AttributeKey<Authentication>` Unique key that identifies a feature

fun install(
    pipeline: Application, 
    configure: Configuration.() -> Unit
): Authentication

Feature installation script