Imports github.com/boombuler/barcode github.com/boombuler/barcode/qr github.com/dgrijalva/jwt-go github.com/mojocn/base64Captcha Standard library imports bytes crypto/md5 encoding/base64 encoding/hex encoding/json errors fmt image/png io/ioutil jcd/service/dbcomm jcd/service/smscode log net/http os strings time