public String getPx_16x16() {
                    return px_16x16;
                }
px_16x16 : https://i.pximg.net/user-profile/img/2018/06/11/22/00/29/14348260_c1f2b130248005062b7c6c358812160a_16.jpg
px_50x50 : https://i.pximg.net/user-profile/img/2018/06/11/22/00/29/14348260_c1f2b130248005062b7c6c358812160a_50.jpg
px_170x170 : https://i.pximg.net/user-profile/img/2018/06/11/22/00/29/14348260_c1f2b130248005062b7c6c358812160a_170.jpg
app/src/main/java/com/perol/asdpl/pixivez/responses/PixivOAuthResponse.java