if caller == nil || err != nil {
		s.monitoring.AuthnError.Increment()
		return nil, status.Error(codes.Unauthenticated, "request authenticate failure")
	}

	serverCaLog := serverCaLog.WithLabels("client", security.GetConnectionAddress(ctx))
	// By default, we will use the callers identity for the certificate
	sans := caller.Identities
	crMetadata := request.Metadata.GetFields()

	// http request
	Request *http.Request
}

// RemoteAddress returns the authenticated remote address from AuthContext.
func (ac *AuthContext) RemoteAddress() string {
	if ac.GrpcContext != nil {
		return GetConnectionAddress(ac.GrpcContext)
	} else if ac.Request != nil {
		return ac.Request.RemoteAddr
	}
	return ""
}

// Header returns the authenticated remote address from AuthContext.