Drain Response.Body

[DmitriyMV]

Since you're using json.Decoder, I think it would be wise to drain response body for connection reuse. See relevant issue:
google/go-github#317
Discussion:
https://stackoverflow.com/questions/17948827/reusing-http-connections-in-golang
https://groups.google.com/forum/#!search/golang%2420json%2420decode%2420%2420io.Copy/golang-nuts/4Rr8BYVKrAI/ZrJJFTNleekJ
Solution to this would be something like this

defer func() {
    io.CopyN(ioutil.Discard, resp.Body, 512)
    resp.Body.Close()
}()

in here

golang-instagram/instagram/core.go

Line 80 in 75f0c6a

defer resp.Body.Close()

If you want I can make a pull request.

Cheers.

[yanatan16]

Good idea. I haven't used this project in a while. Would you write a PR please?