Imports github.com/boombuler/barcode github.com/boombuler/barcode/qr github.com/davidsonff/qrand github.com/golang-jwt/jwt github.com/satori/go.uuid github.com/spf13/pflag github.com/spf13/viper Standard library imports bytes crypto/ecdsa crypto/elliptic crypto/x509 encoding/pem fmt image/png io io/ioutil os runtime