session.Get will never get error

[zn-cn]

Today I use this package test the function of session, but I found when I firstly enter the website, in that time the request don't have session, but use Sesson.Get can't get error. But I think if the session is empty, maybe should return a error.
eg:
code: sess, err := session.Get("userInfo", c)
but in the first time the err is nil.
Can you answer my question?
Thanks.

[zn-cn]

maybe:

func getSession(sessionName, c echo.Context) (*sessions.Session, error) {
	sess, _ := session.Get(sessionName, c)
	if len(sess.Values) == 0 {
		// no session
                // log todo

		return sess, errors.New("no session values")
	}
	return sess, nil
}