How To set domain for cookie golang with "contrib/sessions" package, gin gonic

Question

Please help me!. I wanna set domain for my cookie, In my main function, i set :

store := sessions.NewCookieStore([]byte("secretkey"))
store.Options(sessions.Options{
    Domain: "myexample.com",
})
router.Use(sessions.Sessions("mysession", store))

In my first handler function, i set:

    session := sessions.Default(c)
    session.Set("test", "test value")
    session.Save()

In another handler, i get the "test" session by:

    session := sessions.Default(c)
    result = session.Get("test")

But the problem is the value of result is nil, if i remove

    store.Options(sessions.Options{
    Domain: "myexample.com",
})

in main function, it will work. So anyone can explain for me. Moreover, if i get session "test" in my first handler function, it will be ok.