TokenxConfig
constructor(tokenEndpoint: URI = URI(requiredConfigForKey("token.x.token.endpoint")), clientId: String = requiredConfigForKey("token.x.client.id"), clientSecret: String = requiredConfigForKey("token.x.private.jwk"), jwksUri: String = requiredConfigForKey("token.x.jwks.uri"), issuer: String = requiredConfigForKey("token.x.issuer"))