Using []struct with Json

I'm trying to parse JSON to a []struct, the JSON is retrieved from https://api.github.com/events
However when I try to access each struct within the array I get an error:

type GITHUB_EVENT does not support indexing

How am I able to access each struct within the array?

func httpGetEvents() {
	eventDataRAW := httpPageGet("https://api.github.com/events", true)
	eventDataJSON := new(GITHUB_EVENT)

	_ = json.Unmarshal([]byte(eventDataRAW), &eventDataJSON)

	fmt.Println(eventDataJSON[0].Id)
}

//--------------------------------------------------------------------------------------//

type GITHUB_EVENT []struct {
	Id    string `json:"id"`
	Type  string `json:"type"`
	Actor struct {
		Id         int    `json:"id"`
		Login      string `json:"login"`
		GravatarId string `json:"gravatar_id"`
		Url        string `json:"url"`
		AvatarUrl  string `json:"avatar_url"`
	} `json:"actor"`
	Repo struct {
		Id   int    `json:"id"`
		Name string `json:"name"`
		Url  string `json:"url"`
	} `json:"repo"`
	Payload struct {
		PushId       int    `json:"push_id"`
		Size         int    `json:"size"`
		DistinctSize int    `json:"distinct_size"`
		Ref          string `json:"ref"`
		Head         string `json:"head"`
		Before       string `json:"before"`
		Commits      []struct {
			Sha    string `json:"sha"`
			Author struct {
				Email string `json:"email"`
				Name  string `json:"name"`
			} `json:"author"`
			Message  string `json:"message"`
			Distinct bool   `json:"distinct"`
			Url      string `json:"url"`
		} `json:"commits"`
	} `json:"payload"`
	Public    bool   `json:"public"`
	CreatedAt string `json:"created_at"`
}

This statement:

eventDataJSON := new(GITHUB_EVENT)

declares eventDataJSON as *GITHUB_EVENT (a pointer to a slice), and initializes it as a nil pointer. After unmarshaling, you could access the first event by explicitly deref-ing the pointer before indexing:

(*eventDataJSON)[0].Id

However, the more conventional approach is to use make:

eventDataJSON := make(GITHUB_EVENT, 0)

which declares eventDataJSON as a GITHUB_EVENT, and initializes it as an empty slice. (Remember that make is for special built-in types such as slices, maps, and channels).

You could pass a pointer to this slice to json.Unmarshal:

_ = json.Unmarshal([]byte(eventDataRAW), &eventDataJSON)

...and then index the slice directly:

fmt.Println(eventDataJSON[0].Id)

Additionally, json.Marshal will take care of allocating the output value, so you could declare eventDataJSON and skip any explicit initialization:

var eventDataJSON GITHUB_EVENT

Example: http://play.golang.org/p/zaELDgnpB2