Set map，struct to session in golang( gin gonic framework)

go get github.com/gin-contrib/sessions

import "github.com/gin-contrib/sessions"

router := gin.Default()

store := sessions.NewCookieStore([]byte("secret"))
router.Use(sessions.Sessions("mysession", store))

type User struct {
    ID   int
    Name string
}

func main() {
    router.GET("/login", func(c *gin.Context) {
        session := sessions.Default(c)
        user := User{
            ID:   1,
            Name: "John",
        }
        session.Set("user", user)
        session.Save()
        c.JSON(200, gin.H{"message": "Logged in successfully"})
    })

    router.GET("/profile", func(c *gin.Context) {
        session := sessions.Default(c)
        user := session.Get("user")
        if user != nil {
            c.JSON(200, gin.H{"user": user})
        } else {
            c.JSON(401, gin.H{"message": "Not logged in"})
        }
    })

    router.Run(":8080")
}