Restapi with mgo ang go gin-gonic

main.go

I can't seem to findout how to use go gin-gonic to perform CRUD or GET, PUT and POST with MongoDB

Below is my code, please Kindly assist me

package main

import (
//"encoding/json"
"fmt"
"log"
"net/http"
"os"

// "goji.io"
// "goji.io/pat"
"gopkg.in/gin-gonic/gin.v1"
"gopkg.in/mgo.v2"
// "gopkg.in/mgo.v2/bson"
// "github.com/rs/cors"

)

func ErrorWithJSON(w http.ResponseWriter, message string, code int) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(code)
fmt.Fprintf(w, "{message: %q}", message)
}

func ResponseWithJSON(w http.ResponseWriter, json []byte, code int) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(code)
w.Write(json)
}

type Poll struct {
ID string json:"id,omitempty"
Firstname string json:"firstname,omitempty"
Lastname string json:"lastname,omitempty"
Poll string json:"poll,omitempty"
// Address *Address json:"address,omitempty"
}

func main() {
port := os.Getenv("PORT")

if port == "" {
    log.Fatal("$PORT must be set")
}

session, err := mgo.Dial("localhost")
if err != nil {
    panic(err)
}
defer session.Close()

session.SetMode(mgo.Monotonic, true)
ensureIndex(session)


router := gin.Default()

router.GET("/polls", func(c * gin.Context) {
    //c.HTML(http.StatusOK, "polls", nil)   
    //var polls []Poll
    //err := c.Find(bson.M{}).All(&polls)


    //  **Help Needed Here**

    })

router.Run(":" + port)
}

func ensureIndex(s *mgo.Session) {
session := s.Copy()
defer session.Close()

c := session.DB("store").C("polls")

index := mgo.Index{
    Key:        []string{"id"},
    Unique:     true,
    DropDups:   true,
    Background: true,
    Sparse:     true,
}
err := c.EnsureIndex(index)
if err != nil {
    panic(err)
}
}]