public String getMedium() {
            return medium;
        }
medium : https://i.pximg.net/user-profile/img/2018/08/18/13/33/23/14652189_7fc9018d975d494657755b007d178a3f_170.jpg
app/src/main/java/com/perol/asdpl/pixivez/responses/UserBean.java