Both v3/v4 returns "Internal Server Error 500" on KeyAuth function false

[ilzheev]

e := echo.New()
authGroup := e.Group("/v1")
authGroup.Use(middleware.KeyAuth(func(key string, c echo.Context) (bool, error) {
		user := api.service.CheckUser(key) // checks if user with "key" exists into db
		if user != nil {
			api.user = user
			return true, nil
		}
		err := fmt.Errorf("Invalid auth key: %s", key)
		log.Error(err)
		return false, err
}))

Expected behaviour on failed KeyAuth check – HTTP 401 Unauthorized
But Echo returns HTTP 500 Internal server error.

Do I do something wrong?
Or it is an issue, that needed improvement/fix?

[ilzheev]

Any updates?