Imports github.com/boombuler/barcode github.com/boombuler/barcode/qr github.com/pkg/errors github.com/pquerna/otp github.com/pquerna/otp/totp github.com/zeebo/blake3 Standard library imports bytes crypto/ecdh encoding/base32 encoding/pem fmt image image/png math/big net/url strconv strings time