Decoded json response return empty struct

I'm trying to get trello organization members list. When I print result I've correct number of struct (17 structs, 17 members).

But struct are empty.

This is my code :

package main

import "fmt"
import "net/http"
import "io/ioutil"
import "encoding/json"
import "bytes"

type Obj struct {
  fullName string `json:"fullName"`
  username string `json:"username"`
  id string `json:"id"`
}

func main() {
    fmt.Printf("hello, world\n")

    var key string = "key"
    var token string = "token"
    var orga string = "organization"

    var url = fmt.Sprintf("https://api.trello.com/1/organizations/%s/members", orga)
    var urlQuery = fmt.Sprintf("?key=%s&token=%s", key, token)

    var fullUrl string = url + urlQuery

    fmt.Println(fullUrl)

    resp, err := http.Get(fullUrl)

    body, err2 := ioutil.ReadAll(resp.Body)
    if err2 != nil {
        panic(err.Error())
    }

    people1 := []Obj{}

    decoder := json.NewDecoder(bytes.NewBuffer(body))
    jsonErr := decoder.Decode(&people1)

    if jsonErr != nil {
      panic(jsonErr)
    }

    fmt.Println(people1)
}

And console output :

[{} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {}]

I tried with json.Unmarshal but I've same result.

You need to make sure the fields are exported, or the json decoder can't access them.

Replace fullName string with FullName string etc... Keep the json attributes the same though.