Gin Sessions将状态和代码存储在URL中，我想更改它以使URL更加整洁

I am making a backend using go, the backend should get the google calendar of the user who login in the site using google account. I am using gin to do the routing and sessions from this package github.com/gin-gonic/contrib/sessions

this is my main method

func main() {
    router := gin.Default()
    var store = sessions.NewCookieStore([]byte("secret"))
    router.Use(sessions.Sessions("goquestsession", store))

    router.GET("/", indexHandler)
    router.GET("/login", loginHandler)
    router.GET("/auth", authHandler)

    router.Run("127.0.0.1:9090")
}

func loginHandler(c *gin.Context) {
    state = randToken()
    session := sessions.Default(c)
    session.Set("state", state)
    session.Save()

    c.Writer.Write([]byte("<html><title>Golang Google</title> <body> <a href='" + getLoginURL(state) + "'><button>Login with Google!</button> </a> </body></html>"))
}

then I am using the auth handler to test the code and the state and get the calendar

func authHandler(c *gin.Context) {
    // Handle the exchange code to initiate a transport.
    session := sessions.Default(c)

    retrievedState := session.Get("state")
    queryState := c.Request.URL.Query().Get("state")
    if retrievedState != queryState {
        c.AbortWithError(http.StatusUnauthorized, fmt.Errorf("Invalid session state: %s", retrievedState))
        return
    }
    code := c.Request.URL.Query().Get("code")
    tok, err := conf.Exchange(oauth2.NoContext, code)
    if err != nil {
        c.AbortWithError(http.StatusBadRequest, err)
        return
    }

    client := conf.Client(oauth2.NoContext, tok)
    calendarService, _ := calendar.New(client)
    list, err := calendarService.CalendarList.List().Do()
    if err != nil {
        fmt.Println("error")
    }
    log.Println(list.Items[0].Summary)
    c.Status(http.StatusOK)
}

after writing the code I find out that the link of is like this

http://127.0.0.1:9090/auth?state=BuQ8DyhTEgivb6CatcTzJg8sk2Nb6EUStRkdgGVvDRE%3D&code=4/Qit73p0btO0RRM93_YmjlP0Ex2dqDLsP3JVdrnhNE7Y#

now after looking in the package github.com/gin-gonic/contrib/sessions I didn't find a way to just be like this http://127.0.0.1:9090/auth and save the rest of the link somewhere else do I have to keep using URL like this if I am using Gin or there is some other way to make my link look cleaner

I would personally add a route for the calendar, and then save the code to the session and redirect, so the auth handler url is never really visible, it just sends back a redirect to a clean url:

router.GET("/calendar", calendarHandler)

And then do:

func authHandler(c *gin.Context) {
    // Handle the exchange code to initiate a transport.
    session := sessions.Default(c)

    retrievedState := session.Get("state")
    queryState := c.Request.URL.Query().Get("state")
    if retrievedState != queryState {
        c.AbortWithError(http.StatusUnauthorized, fmt.Errorf("Invalid session state: %s", retrievedState))
        return
    }
    code := c.Request.URL.Query().Get("code")
    session.Set("code", code)
    session.Save()
    c.Redirect(http.StatusFound, "/calendar")
}

func calendarHandler(c *gin.Context) {
    session := sessions.Default(c)
    code := session.Get("code")
    tok, err := conf.Exchange(oauth2.NoContext, code)
    if err != nil {
        c.AbortWithError(http.StatusBadRequest, err)
        return
    }

    client := conf.Client(oauth2.NoContext, tok)
    calendarService, _ := calendar.New(client)
    list, err := calendarService.CalendarList.List().Do()
    if err != nil {
        fmt.Println("error")
    }
    log.Println(list.Items[0].Summary)
    c.Status(http.StatusOK)
}